How to implement automatic loading of jquery

Method to implement automatic loading of jquery: First introduce the jquery library into the execution environment and test the operation of "data loading is completed and execution"; then test "execute after opening, regardless of whether the data is loaded or not".

The operating environment of this tutorial: Windows 7 system, jquery version 3.2.1. This method is suitable for all brands of computers.

Methods to implement automatic loading of jquery:

1. First, introduce the jquery library into the execution environment. The example is a jquery file that the author saved on the cdn.

2. Automatic loading is divided into:

• Data loading is completed and executed

• Execute as soon as it is opened, regardless of whether the data is loaded or not

3. First test the operation of "data loading completed and executed". The method code is as follows

window.onload=function(){
           testFunc();}

4. The running result is as shown in the figure. The function is automatically loaded successfully and the function result is output.

#5. Continue to test "execute as soon as it is opened, regardless of whether the data is loaded or not". The method code is as follows:

Method 1

$(document).ready(function(){    testFunc();});

Method 2

$(function(){    testFunc();});

6. The execution results are the same as the above methods, and they are all automatically load.

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