Use JavaScript to verify data on the client side, so as to reduce the resource consumption of the network and server.
But in fact, JavaScript is far more than just this feature. NextWebsite DesignShangpin China will introduce the basic knowledge of JavaScript.
Basic format of JavaScript
JavaScript code, like HTML, is a text character format. You can directly use<script></Script>tags are embedded in HTML documents and can be loaded dynamically.
Code 1-6 is a JavaScript web page. Embedding JavaScript in HTML starts with the<script>tag. The "language" attribute in the<script>tag specifies that the embedded script language is JavaScript. Line 10 is used to write "This is the content of JavaScript output" to the HTML document.
Save the above code as "js.htm", open it with a browser, and the display result is as shown in Figure 1.18.