JavaScript to call functions through strings

This article describes the implementation method of JavaScript calling functions through strings. Share it for your reference. The specific analysis is as follows:

In JavaScript, we can call functions based on the string of function names, so that we can implement dynamic function calls, and we only need to pass the name of a function to call the function.

Copy the code as follows: var strFun = "someFunction"; //Name of the function to be called

var strParam = "this is the parameter"; //Parameters to be passed in function

//Create the function

var fn = window[strFun];

//Call the function

fn(strParam);

Below is a detailed call example

Copy the code code as follows: <input type="text" id="functionName" name="functionName" size="20" value="fnFooBar">

<input type="text" id="functionParam" name="functionParam" size="30" value="Happy New Year.!!">

<input type="button" style="font-weight:bold" value="Call" onclick="javascript:call();">

<br>

<pre>

function fnFooBar(strVal) {

alert(strVal);

return 1;

}

</pre>

<br>

<script>

function fnFooBar(strVal) {

alert(strVal);

return 1;

}

function call() {

var strFunctionName = document.getElementById("functionName").value;

var strFunctionParam = document.getElementById("functionParam").value;

var fn = window[strFunctionName]

var ret = fn(strFunctionParam);

}

</script>

I hope this article will be helpful to everyone's JavaScript programming.