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This article mainly introduces javascript script how to put the relevant knowledge, detailed and easy to understand, simple and fast operation, has a certain reference value, I believe we read this javascript script how to put the article will have some gains, let's take a look at it.

JavaScript scripts can be placed in: 1. HTML body part, JavaScript scripts will be executed when the page loads;2. HTML head part, JavaScript scripts will be executed when invoked.

Operating environment of this tutorial: Windows 7 system, Javascript version 1.8.5, Dell G3 computer.

Location of javascript script:

HTML body section, JavaScripts will be executed when the page loads.

HTML head section, JavaScripts will be executed when called.

Description:

JavaScripts in a page are executed immediately when the browser loads the page. We don't always want this to happen. Sometimes we want a script to execute when the page loads, and sometimes we want a script to execute when the user triggers an event.

Script in the head section: Scripts that need to be invoked or event-triggered are placed in the head section of HTML. When you put scripts in the head section, you can guarantee that scripts are loaded before any calls.

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