[英]XMLHttpRequest javascript prototypes not working
We're trying to include our website by w3-include-html function on another website, followed by some xmlhttprequests for the *.js files. 我们正在尝试通过在另一个网站上添加w3-include-html函数,然后在* .js文件中添加一些xmlhttprequests来包含我们的网站。
function loadJS(url,onDone,onError){
var xhr=window.XMLHttpRequest?new XMLHttpRequest():new ActiveXObject("Microsoft.XMLHTTP");
xhr.onreadystatechange=function(){
if(xhr.readyState==4){
if(xhr.status==200||xhr.status==0){
setTimeout(function(){
try{
eval(xhr.responseText);
}catch(e){
}
onDone();
}.bind(this),1);
}else{
}
}
}.bind(this);
try{
xhr.open("GET",url,true);
xhr.send();
}catch(e){
}};
This seems to work, only calling on function from another .js-file stops the execution. 这似乎可行,只有从另一个.js文件中调用函数才能停止执行。 Manually calling the function from browser-console throws 从浏览器控制台抛出异常手动调用该函数
Uncaught ReferenceError: splash is not defined at :1:1 未捕获的ReferenceError:飞溅未定义为:1:1
This only happens for functions that are also prototypes. 这仅适用于也是原型的函数。
First .js file: 第一个.js文件:
var eless = function () {
this.$body = $('body');
var self = this;
window.dataLayer = window.dataLayer || [];
this.init();
this.loop();
console.log("before");
new splash();
console.log("after");
second .js file: 第二个.js文件:
var splash = function() {
console.log('after after');
console.log(this.init);
this.init();
console.log("after after after");
};
splash.prototype = {
init: function () {
var self = this;
[...]
eval
works in local scope, so your eval
在本地范围内有效,因此您的
eval(xhr.responseText);
...runs the code as though it were inside that callback. ...运行代码,就好像它在该回调中一样。 Top-level function declarations and such won't be globals. 顶级函数声明等不是全局变量。
If you want to evaluate the code at global scope, you can use the "indirect eval
" trick: 如果要在全局范围内评估代码,则可以使用“间接eval
”技巧:
(0, eval)(xhr.responseText);
But , I would strongly recommend stepping back and re-evaluating what you're doing. 但是 ,我强烈建议您退后一步,重新评估您的工作。 Using XHR to request script code you then eval
seems off. 使用XHR请求脚本代码,然后eval
似乎已结束。 You could just append a script
element to the page instead. 您可以只向页面添加script
元素。
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