load.js ➔ getTarget - Code Metrics - Inspection of "update load.js" - UnitApi/js - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 44be85...d64e50 )

by Tomasz

created 2020-02-10 08:14 UTC

load.js ➔ getTarget A

↳ Parent: load.js

Complexity

Conditions

Size

Total Lines	11
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	8
dl	0
loc	11
rs	10
c	0
b	0
f	0
cc	3

// TODO: if function not exist try to load from main folder with the name {NameOfFunction}.js
var Load = function (target, success, error) {
    //url is URL of external file, success is the code
    //to be called from the file, location is the location to
    //insert the <script> element
    this.cfg = {};
    this.cfg.target = target;
    this.cfg.delay = 0;
    this.cfg.cache = 1;

    this.success = success;
    this.error = error;


    var self = this;

    this.target = function (target) {
        self.cfg.target = target;
        return this;
    };

    this.delay = function (delay) {
        self.cfg.delay = delay;
        return this;
    };

    this.cache = function (cache) {
        self.cfg.cache = cache;
        return this;
    };

    this.cacheOff = function () {
        self.cfg.cache = 0;

        return this;
    };

    this.cacheOn = function () {
        self.cfg.cache = 1;

        return this;
    };

    this.js = function (url) {
        if (typeof self.cfg.delay === 'number' && self.cfg.delay > 1) {
            setTimeout(function () {
                    console.log('delayed', self.cfg.delay, url);

                    self.loadJs(url, self.cfg.target, self.success, self.error);
                },
                self.cfg.delay
            );
        } else {
            console.log('loaded', url);

            self.loadJs(url, self.cfg.target, self.success, self.error);
        }
        return this;
    };
    this.javascript = this.js;
    this.script = this.js;


    this.css = function (url) {
        if (typeof self.cfg.delay === 'number' && self.cfg.delay > 1) {
            setTimeout(function () {
                    console.log('delayed', self.cfg.delay, url);

                    self.loadCss(url, self.cfg.target, self.success, self.error);
                },
                self.cfg.delay
            );
        } else {
            console.log('loaded', url);

            self.loadCss(url, self.cfg.target, self.success, self.error);
        }
        return this;
        //
        // if (typeof url === 'object') {
        //     //console.log('obj:', obj);
        //
        //     for (var i in url) {
        //
        //         console.log('load js url[i]', url[i]);
        //
        //         try {
        //             var exe = includeStyle(url[i], self.cfg.target, success, error);
        //             console.log('load js ', url[i], exe);
        //         } catch (err) {
        //             console.error('!load js ', url[i], err);
        //         }
        //     }
        // } else {
        //     includeHtml(url, self.cfg.target, success, error);
        //     // console.error('apiunit obj: is not object:', obj);
        // }
        // return this;
    };
    this.style = this.css;

    // TODO: check if is loaded
    this.loadJs = function (url, target, success, error) {
        var suffix = '';
        if (typeof self.cfg.cache === 'number' && self.cfg.cache !== 1) {
            suffix = '?' + time();
        }

        if (typeof url === 'object') {
            //console.log('obj:', obj);

            for (var i in url) {
var someObject;
for (var key in someObject) {
    if ( ! someObject.hasOwnProperty(key)) {
        continue; // Skip keys from the prototype.
    }

    doSomethingWith(key);
}

                console.log('load js url[i]', url[i]);


                try {
                    var exe = includeJs(url[i] + suffix, target, success, error);
                    console.log('load js ', url[i], exe);
                } catch (err) {
                    console.error('!load js ', url[i], err);
                }
            }
        } else {
            includeJs(url + suffix, target, success, error);
            // console.error('apiunit obj: is not object:', obj);
        }

        return this;
    };

    this.loadCss = function (url, target, success, error) {
        var suffix = '';
        if (typeof self.cfg.cache === 'number' && self.cfg.cache !== 1) {
            suffix = '?' + time();
        }

        if (typeof url === 'object') {
            //console.log('obj:', obj);

            for (var i in url) {
var someObject;
for (var key in someObject) {
    if ( ! someObject.hasOwnProperty(key)) {
        continue; // Skip keys from the prototype.
    }

    doSomethingWith(key);
}

                console.log('load CSS url[i]', url[i]);


                try {
                    var exe = includeStyle(url[i] + suffix, target, success, error);
                    console.log('load CSS ', url[i], exe);
                } catch (err) {
                    console.error('!load CSS ', url[i], err);
                }
            }
        } else {
            includeStyle(url + suffix, target, success, error);
            // console.error('apiunit obj: is not object:', obj);
        }

        return this;
    };


    this.html = function (url) {
        if (typeof url === 'object') {
            //console.log('obj:', obj);

            for (var i in url) {
var someObject;
for (var key in someObject) {
    if ( ! someObject.hasOwnProperty(key)) {
        continue; // Skip keys from the prototype.
    }

    doSomethingWith(key);
}

                console.log('load js url[i]', url[i]);


                try {
                    var exe = includeHtml(url[i], self.cfg.target, success, error);
                    console.log('load js ', url[i], exe);
                } catch (err) {
                    console.error('!load js ', url[i], err);
                }
            }
        } else {
            includeHtml(url, self.cfg.target, success, error);
            // console.error('apiunit obj: is not object:', obj);
        }
        return this;
    };


    this.image = function (url) {
        if (typeof self.cfg.delay === 'number' && self.cfg.delay > 1) {
            setTimeout(function () {
                    console.log('image delayed', self.cfg.delay, url);

                    self.loadImage(url, self.cfg.target, self.success, self.error);
                },
                self.cfg.delay
            );
        } else {
            console.log('image loaded', url, self.cfg.delay);

            self.loadImage(url, self.cfg.target, self.success, self.error);
        }
        return this;
    };

    this.loadImage = function (url, target, success, error) {
        if (typeof url === 'object') {
            //console.log('obj:', obj);

            for (var i in url) {
var someObject;
for (var key in someObject) {
    if ( ! someObject.hasOwnProperty(key)) {
        continue; // Skip keys from the prototype.
    }

    doSomethingWith(key);
}

                console.log('load js url[i]', url[i]);


                try {
                    var exe = includeImage(url[i], target, success, error);

                    console.log('load js ', url[i], exe);
                } catch (err) {
                    console.error('!load js ', url[i], err);
                }
            }
        } else {
            includeImage(url, self.cfg.target, success, error);
            // console.error('apiunit obj: is not object:', obj);
        }
        return this;
    };

    this.img = this.image;

    return this;
};

function includeJs(url, target, success, error) {
    var scriptTag = document.createElement('script');
    scriptTag.src = url;
    scriptTag.type = 'text/javascript';

    scriptTag.onerror = error;
    scriptTag.onload = success;
    scriptTag.onreadystatechange = success;

    return getTarget(target).appendChild(scriptTag);
}

function isEmpty(val) {
    return val == null || typeof val === 'undefined' || val.length < 1;

}

function getTarget(target) {
    if (isEmpty(target)) {
        console.log('HEAD');

        target = document.getElementsByTagName('head')[0];
        if (isEmpty(target)) {
            console.log('BODY');
            target = document.body;
        }
    }
    return target;
}

function createTagLink(url, success, error) {
    var link = document.createElement('link');
    link.href = url;
    link.rel = 'stylesheet';
    link.type = 'text/css';
    link.media = 'all';

    link.onerror = error;
    link.onload = success;
    link.onreadystatechange = success;

    return link;
}


function getXHRObject() {
    var xhrObj = false;

    try {
        xhrObj = new XMLHttpRequest();
    } catch (e) {
        var progid = ['MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0',
            'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP'];
        for (var i = 0; i < progid.length; ++i) {
            try {
                xhrObj = new ActiveXObject(progid[i]);

            } catch (e) {
                continue;
            }
            break;
        }
    } finally {
        return xhrObj;

    }
}

// TODO: replce path to id name and check if ID exist
// FASTEST loading:
// https://www.oreilly.com/library/view/even-faster-web/9780596803773/ch04.html
function includeStyle(url, target, success, error) {
    // console.log(target, target == null);
    // return false;

    // var xhrObj = getXHRObject(); // defined in the previous example
    // xhrObj.onreadystatechange =
    //     function () {
    //         if (xhrObj.readyState == 4) {
    //             // var scriptElem = document.createElement('script');
    //             var scriptElem = document.createElement('style');
    //             document.getElementsByTagName('head')[0].appendChild(scriptElem);
    //             scriptElem.text = xhrObj.responseText;
    //         }
    //     };
    // xhrObj.open('GET', url, true); // must be same domain as main page
    // return xhrObj.send('');


    var link = createTagLink(url, success, error);
    return getTarget(target).appendChild(link);
}


function includeHtml(url, target, success, error) {

    var xhttp;

    var el = new E(target);
    var elmnt = el.first();

    if (typeof success !== 'function') {
        success = function () {
            console.log('includeHtml success', "included");

        }
    }

    if (typeof error !== 'function') {
        error = function () {
            console.log('includeHtml error', "Page not found.");

        }
    }
    console.log('includeHtml url', url);


    if (url) {
        /* Make an HTTP request using the attribute value as the url name: */
        xhttp = new XMLHttpRequest();
        xhttp.onreadystatechange = function () {
            console.log('includeHtml el_id', target);


            if (this.readyState == 4) {
                if (this.status == 200) {

                    elmnt.insertAdjacentHTML('beforeend', this.responseText);

                    success(this);

                }
                if (this.status == 404) {
                    elmnt.innerHTML = "includeHtml Page not found.";
                    error(this);

                }
                /* Remove the attribute, and call this function once more: */
                // includeHtml(url, success, error);
            }
        }
        xhttp.open("GET", url, true);
        xhttp.send();
        /* Exit the function: */
        return this;
    }
    return false;

}

// function includeImage(url, target, success, error) {

function includeImage(url, target) {
    console.log('includeImg url: ', url);

    var el = new E(target);
    var elmnt = el.first();

    let img = new Image;

    img.onload = function () {
        console.log("includeImg onload: ", url);

        elmnt.appendChild(img);
    };

    return img.src = url;  // erst nach dem Event Listener!

}


var time = Date.now || function () {
    return +new Date;
};


var E = function (selector, area, error, success) {

    this.cfg = {};
    this.cfg.area = document;
    this.cfg.selector = selector;
    this.cfg.exist = false;

    this.success = function (elem) {
        console.log("Element elem: ", elem);

    };

    this.error = function (elem) {
        console.error("! Element elem: ", elem);
    };

    if (typeof success === 'function') {
        this.success = success;
    }

    if (typeof error === 'function') {
        this.error = error;
    }


    var self = this;

    this.selector = function (selector) {
        self.cfg.selector = selector;
        return this;
    }

    this.first = function (error, success) {
        if (typeof success !== 'function') {
            success = self.success;
        }
        if (typeof error !== 'function') {
            error = self.error;
        }

        const elem = document.querySelector(self.cfg.selector);

        console.log('E first self.cfg.selector', self.cfg.selector);

        console.log('E first elem', elem);

        if (elem !== null) {
            self.cfg.exist = true;
            success(elem);
            return elem;
        } else {

            self.cfg.exist = false;
            error();
        }

        return elem;
    }

    this.all = function (error, success) {
        if (typeof success !== 'function') {
            success = self.success;
        }
        if (typeof error !== 'function') {
            error = self.error;
        }

        const elem = document.querySelectorAll(self.cfg.selector);

        console.log('E all self.cfg.selector', self.cfg.selector);

        console.log('E all elem', elem);

        if (elem !== null) {
            self.cfg.exist = true;
            success(elem);
        } else {
            self.cfg.exist = false;
            error(elem);
        }

        return elem;
    }
};

1		// TODO: if function not exist try to load from main folder with the name {NameOfFunction}.js
2		var Load = function (target, success, error) {
3		//url is URL of external file, success is the code
4		//to be called from the file, location is the location to
5		//insert the <script> element
6		this.cfg = {};
7		this.cfg.target = target;
8		this.cfg.delay = 0;
9		this.cfg.cache = 1;
10
11		this.success = success;
12		this.error = error;
13
14
15		var self = this;
16
17		this.target = function (target) {
18		self.cfg.target = target;
19		return this;
20		};
21
22		this.delay = function (delay) {
23		self.cfg.delay = delay;
24		return this;
25		};
26
27		this.cache = function (cache) {
28		self.cfg.cache = cache;
29		return this;
30		};
31
32		this.cacheOff = function () {
33		self.cfg.cache = 0;
34
35		return this;
36		};
37
38		this.cacheOn = function () {
39		self.cfg.cache = 1;
40
41		return this;
42		};
43
44		this.js = function (url) {
45		if (typeof self.cfg.delay === 'number' && self.cfg.delay > 1) {
46		setTimeout(function () {
47		console.log('delayed', self.cfg.delay, url);
		0 ignored issues – show Debugging Code introduced 2020-02-10 08:27 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
48		self.loadJs(url, self.cfg.target, self.success, self.error);
49		},
50		self.cfg.delay
51		);
52		} else {
53		console.log('loaded', url);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
54		self.loadJs(url, self.cfg.target, self.success, self.error);
55		}
56		return this;
57		};
58		this.javascript = this.js;
59		this.script = this.js;
60
61
62		this.css = function (url) {
63		if (typeof self.cfg.delay === 'number' && self.cfg.delay > 1) {
64		setTimeout(function () {
65		console.log('delayed', self.cfg.delay, url);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
66		self.loadCss(url, self.cfg.target, self.success, self.error);
67		},
68		self.cfg.delay
69		);
70		} else {
71		console.log('loaded', url);
		0 ignored issues – show Debugging Code introduced 2020-02-10 08:27 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
72		self.loadCss(url, self.cfg.target, self.success, self.error);
73		}
74		return this;
75		//
76		// if (typeof url === 'object') {
77		// //console.log('obj:', obj);
78		//
79		// for (var i in url) {
80		//
81		// console.log('load js url[i]', url[i]);
82		//
83		// try {
84		// var exe = includeStyle(url[i], self.cfg.target, success, error);
85		// console.log('load js ', url[i], exe);
86		// } catch (err) {
87		// console.error('!load js ', url[i], err);
88		// }
89		// }
90		// } else {
91		// includeHtml(url, self.cfg.target, success, error);
92		// // console.error('apiunit obj: is not object:', obj);
93		// }
94		// return this;
95		};
96		this.style = this.css;
97
98		// TODO: check if is loaded
99		this.loadJs = function (url, target, success, error) {
100		var suffix = '';
101		if (typeof self.cfg.cache === 'number' && self.cfg.cache !== 1) {
102		suffix = '?' + time();
103		}
104
105		if (typeof url === 'object') {
106		//console.log('obj:', obj);
107
108		for (var i in url) {
		0 ignored issues – show Complexity introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report A for in loop automatically includes the property of any prototype object, consider checking the key using `hasOwnProperty`. When iterating over the keys of an object, this includes not only the keys of the object, but also keys contained in the prototype of that object. It is generally a best practice to check for these keys specifically: var someObject; for (var key in someObject) { if ( ! someObject.hasOwnProperty(key)) { continue; // Skip keys from the prototype. } doSomethingWith(key); } Loading history...
109
110		console.log('load js url[i]', url[i]);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
111
112		try {
113		var exe = includeJs(url[i] + suffix, target, success, error);
114		console.log('load js ', url[i], exe);
115		} catch (err) {
116		console.error('!load js ', url[i], err);
117		}
118		}
119		} else {
120		includeJs(url + suffix, target, success, error);
121		// console.error('apiunit obj: is not object:', obj);
122		}
123
124		return this;
125		};
126
127		this.loadCss = function (url, target, success, error) {
128		var suffix = '';
129		if (typeof self.cfg.cache === 'number' && self.cfg.cache !== 1) {
130		suffix = '?' + time();
131		}
132
133		if (typeof url === 'object') {
134		//console.log('obj:', obj);
135
136		for (var i in url) {
		0 ignored issues – show Complexity introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report A for in loop automatically includes the property of any prototype object, consider checking the key using `hasOwnProperty`. When iterating over the keys of an object, this includes not only the keys of the object, but also keys contained in the prototype of that object. It is generally a best practice to check for these keys specifically: var someObject; for (var key in someObject) { if ( ! someObject.hasOwnProperty(key)) { continue; // Skip keys from the prototype. } doSomethingWith(key); } Loading history...
137
138		console.log('load CSS url[i]', url[i]);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
139
140		try {
141		var exe = includeStyle(url[i] + suffix, target, success, error);
142		console.log('load CSS ', url[i], exe);
143		} catch (err) {
144		console.error('!load CSS ', url[i], err);
145		}
146		}
147		} else {
148		includeStyle(url + suffix, target, success, error);
149		// console.error('apiunit obj: is not object:', obj);
150		}
151
152		return this;
153		};
154
155
156		this.html = function (url) {
157		if (typeof url === 'object') {
158		//console.log('obj:', obj);
159
160		for (var i in url) {
		0 ignored issues – show Complexity introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report A for in loop automatically includes the property of any prototype object, consider checking the key using `hasOwnProperty`. When iterating over the keys of an object, this includes not only the keys of the object, but also keys contained in the prototype of that object. It is generally a best practice to check for these keys specifically: var someObject; for (var key in someObject) { if ( ! someObject.hasOwnProperty(key)) { continue; // Skip keys from the prototype. } doSomethingWith(key); } Loading history...
161
162		console.log('load js url[i]', url[i]);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
163
164		try {
165		var exe = includeHtml(url[i], self.cfg.target, success, error);
166		console.log('load js ', url[i], exe);
167		} catch (err) {
168		console.error('!load js ', url[i], err);
169		}
170		}
171		} else {
172		includeHtml(url, self.cfg.target, success, error);
173		// console.error('apiunit obj: is not object:', obj);
174		}
175		return this;
176		};
177
178
179		this.image = function (url) {
180		if (typeof self.cfg.delay === 'number' && self.cfg.delay > 1) {
181		setTimeout(function () {
182		console.log('image delayed', self.cfg.delay, url);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
183		self.loadImage(url, self.cfg.target, self.success, self.error);
184		},
185		self.cfg.delay
186		);
187		} else {
188		console.log('image loaded', url, self.cfg.delay);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
189		self.loadImage(url, self.cfg.target, self.success, self.error);
190		}
191		return this;
192		};
193
194		this.loadImage = function (url, target, success, error) {
195		if (typeof url === 'object') {
196		//console.log('obj:', obj);
197
198		for (var i in url) {
		0 ignored issues – show Complexity introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report A for in loop automatically includes the property of any prototype object, consider checking the key using `hasOwnProperty`. When iterating over the keys of an object, this includes not only the keys of the object, but also keys contained in the prototype of that object. It is generally a best practice to check for these keys specifically: var someObject; for (var key in someObject) { if ( ! someObject.hasOwnProperty(key)) { continue; // Skip keys from the prototype. } doSomethingWith(key); } Loading history...
199
200		console.log('load js url[i]', url[i]);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
201
202		try {
203		var exe = includeImage(url[i], target, success, error);
		0 ignored issues – show Bug introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report The call to `includeImage` seems to have too many arguments starting with `success`. Loading history...
204		console.log('load js ', url[i], exe);
205		} catch (err) {
206		console.error('!load js ', url[i], err);
207		}
208		}
209		} else {
210		includeImage(url, self.cfg.target, success, error);
211		// console.error('apiunit obj: is not object:', obj);
212		}
213		return this;
214		};
215
216		this.img = this.image;
217
218		return this;
219		};
220
221		function includeJs(url, target, success, error) {
222		var scriptTag = document.createElement('script');
223		scriptTag.src = url;
224		scriptTag.type = 'text/javascript';
225
226		scriptTag.onerror = error;
227		scriptTag.onload = success;
228		scriptTag.onreadystatechange = success;
229
230		return getTarget(target).appendChild(scriptTag);
231		}
232
233		function isEmpty(val) {
234		return val == null \|\| typeof val === 'undefined' \|\| val.length < 1;
		0 ignored issues – show Best Practice introduced 2020-02-10 08:27 UTC by Report Bug Copy Issue Report Comparing `val` to `null` using the `==` operator is not safe. Consider using `===` instead. Loading history...
235		}
236
237		function getTarget(target) {
238		if (isEmpty(target)) {
239		console.log('HEAD');
		0 ignored issues – show Debugging Code introduced 2020-02-10 08:27 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
240		target = document.getElementsByTagName('head')[0];
241		if (isEmpty(target)) {
242		console.log('BODY');
243		target = document.body;
244		}
245		}
246		return target;
247		}
248
249		function createTagLink(url, success, error) {
250		var link = document.createElement('link');
251		link.href = url;
252		link.rel = 'stylesheet';
253		link.type = 'text/css';
254		link.media = 'all';
255
256		link.onerror = error;
257		link.onload = success;
258		link.onreadystatechange = success;
259
260		return link;
261		}
262
263
264		function getXHRObject() {
265		var xhrObj = false;
		0 ignored issues – show Unused Code introduced 2020-02-10 08:27 UTC by Report Bug Copy Issue Report The assignment to variable `xhrObj` seems to be never used. Consider removing it. Loading history...
266		try {
267		xhrObj = new XMLHttpRequest();
268		} catch (e) {
269		var progid = ['MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0',
270		'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP'];
271		for (var i = 0; i < progid.length; ++i) {
272		try {
273		xhrObj = new ActiveXObject(progid[i]);
		0 ignored issues – show Bug introduced 2020-02-10 08:27 UTC by Report Bug Copy Issue Report The variable `ActiveXObject` seems to be never declared. If this is a global, consider adding a `/** global: ActiveXObject */` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history...
274		} catch (e) {
275		continue;
276		}
277		break;
278		}
279		} finally {
280		return xhrObj;
		0 ignored issues – show Comprehensibility Bug introduced 2020-02-10 08:27 UTC by Report Bug Copy Issue Report Usage of the `return` statement in a finally clause is discouraged. This construct may mask errors and makes debugging difficult. Loading history...
281		}
282		}
283
284		// TODO: replce path to id name and check if ID exist
285		// FASTEST loading:
286		// https://www.oreilly.com/library/view/even-faster-web/9780596803773/ch04.html
287		function includeStyle(url, target, success, error) {
288		// console.log(target, target == null);
289		// return false;
290
291		// var xhrObj = getXHRObject(); // defined in the previous example
292		// xhrObj.onreadystatechange =
293		// function () {
294		// if (xhrObj.readyState == 4) {
295		// // var scriptElem = document.createElement('script');
296		// var scriptElem = document.createElement('style');
297		// document.getElementsByTagName('head')[0].appendChild(scriptElem);
298		// scriptElem.text = xhrObj.responseText;
299		// }
300		// };
301		// xhrObj.open('GET', url, true); // must be same domain as main page
302		// return xhrObj.send('');
303
304
305		var link = createTagLink(url, success, error);
306		return getTarget(target).appendChild(link);
307		}
308
309
310	View Code Duplication	function includeHtml(url, target, success, error) {
		0 ignored issues – show Duplication introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
311		var xhttp;
312
313		var el = new E(target);
314		var elmnt = el.first();
315
316		if (typeof success !== 'function') {
317		success = function () {
318		console.log('includeHtml success', "included");
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
319		}
320		}
321
322		if (typeof error !== 'function') {
323		error = function () {
324		console.log('includeHtml error', "Page not found.");
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
325		}
326		}
327		console.log('includeHtml url', url);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
328
329		if (url) {
330		/* Make an HTTP request using the attribute value as the url name: */
331		xhttp = new XMLHttpRequest();
332		xhttp.onreadystatechange = function () {
333		console.log('includeHtml el_id', target);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
334
335		if (this.readyState == 4) {
336		if (this.status == 200) {
337
338		elmnt.insertAdjacentHTML('beforeend', this.responseText);
339
340		success(this);
		0 ignored issues – show Bug introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report The call to `success` seems to have too many arguments starting with `this`. Loading history...
341		}
342		if (this.status == 404) {
343		elmnt.innerHTML = "includeHtml Page not found.";
344		error(this);
		0 ignored issues – show Bug introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report The call to `error` seems to have too many arguments starting with `this`. Loading history...
345		}
346		/* Remove the attribute, and call this function once more: */
347		// includeHtml(url, success, error);
348		}
349		}
350		xhttp.open("GET", url, true);
351		xhttp.send();
352		/* Exit the function: */
353		return this;
354		}
355		return false;
356
357		}
358
359		// function includeImage(url, target, success, error) {
360
361		function includeImage(url, target) {
362		console.log('includeImg url: ', url);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
363		var el = new E(target);
364		var elmnt = el.first();
365
366		let img = new Image;
		0 ignored issues – show Bug introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report The variable `Image` seems to be never declared. If this is a global, consider adding a `/** global: Image */` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history...
367		img.onload = function () {
368		console.log("includeImg onload: ", url);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
369		elmnt.appendChild(img);
370		};
371
372		return img.src = url; // erst nach dem Event Listener!
373
374		}
375
376
377		var time = Date.now \|\| function () {
378		return +new Date;
379		};
380
381
382	View Code Duplication	var E = function (selector, area, error, success) {
		0 ignored issues – show Duplication introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
383		this.cfg = {};
384		this.cfg.area = document;
385		this.cfg.selector = selector;
386		this.cfg.exist = false;
387
388		this.success = function (elem) {
389		console.log("Element elem: ", elem);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
390		};
391
392		this.error = function (elem) {
393		console.error("! Element elem: ", elem);
394		};
395
396		if (typeof success === 'function') {
397		this.success = success;
398		}
399
400		if (typeof error === 'function') {
401		this.error = error;
402		}
403
404
405		var self = this;
406
407		this.selector = function (selector) {
408		self.cfg.selector = selector;
409		return this;
410		}
411
412		this.first = function (error, success) {
413		if (typeof success !== 'function') {
414		success = self.success;
415		}
416		if (typeof error !== 'function') {
417		error = self.error;
418		}
419
420		const elem = document.querySelector(self.cfg.selector);
421
422		console.log('E first self.cfg.selector', self.cfg.selector);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
423		console.log('E first elem', elem);
424
425		if (elem !== null) {
426		self.cfg.exist = true;
427		success(elem);
428		return elem;
429		} else {
		0 ignored issues – show Comprehensibility introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `else` is not necessary here since all `if` branches return, consider removing it to reduce nesting and make code more readable. Loading history...
430		self.cfg.exist = false;
431		error();
432		}
433
434		return elem;
435		}
436
437		this.all = function (error, success) {
438		if (typeof success !== 'function') {
439		success = self.success;
440		}
441		if (typeof error !== 'function') {
442		error = self.error;
443		}
444
445		const elem = document.querySelectorAll(self.cfg.selector);
446
447		console.log('E all self.cfg.selector', self.cfg.selector);
		0 ignored issues – show Debugging Code introduced 2019-10-09 13:01 UTC by Report Bug Copy Issue Report `console.log` looks like debug code. Are you sure you do not want to remove it? Loading history...
448		console.log('E all elem', elem);
449
450		if (elem !== null) {
451		self.cfg.exist = true;
452		success(elem);
453		} else {
454		self.cfg.exist = false;
455		error(elem);
456		}
457
458		return elem;
459		}
460		};

UnitApi / js

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load.js ➔ getTarget A

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