Three ways to load a JS file dynamically
- 2020-03-26 23:48:06
- OfStack
Just look at the example.
Example 1 reloads the js file
Example 2: the method of reloading javascript files (giving js an id) is encapsulated as a method for everyone to use:
For example 3 jquery, just use getScript.
Example 1 reloads the js file
function loadJs(file) {
var head = $("head").remove("script[role='reload']");
$("<scri" + "pt>" + "</scr" + "ipt>").attr({ role: 'reload', src: file, type: 'text/javascript' }).appendTo(head);
}
Example 2: the method of reloading javascript files (giving js an id) is encapsulated as a method for everyone to use:
function reloadAbleJSFn(id,newJS)
{
var oldjs = null;
var t = null;
var oldjs = document.getElementById(id);
if(oldjs) oldjs.parentNode.removeChild(oldjs);
var scriptObj = document.createElement("script");
scriptObj.src = newJS;
scriptObj.type = "text/javascript";
scriptObj.id = id;
document.getElementsByTagName("head")[0].appendChild(scriptObj);
}
For example 3 jquery, just use getScript.
<script type="text/javascript" src="../jquery.js"></script>
<script type="text/javascript">
$(function()
{
$('#loadButton').click(function(){
$.getScript('new.js',function(){
newFun('"Checking new script"');//This function is inside new.js and runs when you click click
});
});
});
</script>
</head>
<body>
<button type="button" id="loadButton">Load</button>