动态顺序加载javascript
我有5个不同的js文件,我想在ajax调用成功响应状态后执行它们 我目前正在做的是:动态顺序加载javascript,javascript,jquery,asynchronous,onload,Javascript,Jquery,Asynchronous,Onload,我有5个不同的js文件,我想在ajax调用成功响应状态后执行它们 我目前正在做的是: function require(list, fn) { for (var i = 0; i < list.length; i++) { var headID = document.getElementsByTagName("head")[0]; var newScript = document.createElement('script'); ne
function require(list, fn)
{
for (var i = 0; i < list.length; i++) {
var headID = document.getElementsByTagName("head")[0];
var newScript = document.createElement('script');
newScript.type = 'text/javascript';
newScript.src = list[i];
if (newScript.readyState){ //IE
newScript.onreadystatechange = function(){
if (newScript.readyState == "loaded" ||
newScript.readyState == "complete"){
newScript.onreadystatechange = null;
callback();
}
};
} else { //Others
newScript.onload = function(){
callback();
};
}
newScript.src = url;
headID.appendChild(newScript);
}
}
但是没有效果。这应该可以:
const require = ([head, ...tail]) => {
const loadScript = link => new Promise((fulfill, reject) => {
const script = document.createElement('script');
script.addEventListener('load', fulfill);
script.addEventListener('error', reject);
script.src = link;
document.head.appendChild(script);
});
loadScript(head).then(() => {
if (tail.length > 0) {
require(tail);
}
});
};
我希望代码是自我解释的
还要确保dca
变量为。这应该可以:
const require = ([head, ...tail]) => {
const loadScript = link => new Promise((fulfill, reject) => {
const script = document.createElement('script');
script.addEventListener('load', fulfill);
script.addEventListener('error', reject);
script.src = link;
document.head.appendChild(script);
});
loadScript(head).then(() => {
if (tail.length > 0) {
require(tail);
}
});
};
我希望代码是自我解释的
还要确保
dca
变量为。您可以在var dca中定义它;如果您需要它们全部加载first use promises或像require.js这样的加载程序,“在file2.js上声明变量dca”是dca
全局变量吗?您可以在var dca中定义它;如果您需要将它们全部加载到first use promises或require.js之类的加载程序中,“在file2.js上声明一个变量dca”是dca
全局变量吗?