JavaScript errors-throw, try, and catch

Source: Internet
Author: User
Tags button type

The try statement tests the code block for errors.

The catch statement handles the error.

The throw statement creates a custom error. (which is the error message that you want to display)

<body>?<p> Please output a5ToTenThe number between the:</p>?<input id="Demo"Type="text"><button type="Button"onclick="myFunction ()"> Test Input </button><p id="message"></p>?<script>function MyFunction () {varmessage, X; Message= document.getElementById ("message"); Message.innerhtml=""; X= document.getElementById ("Demo"). Value; Try {         if(x = ="")Throw "value is null Soyo"; if(IsNaN (x))Throw "not a number ."; X=Number (x); if(X <5)Throw "too small"; if(X >Ten)Throw "too Big"; }    Catch(Err) {message.innerhtml="Error:"+err; }}</script>?</body>

JavaScript errors-throw, try, and catch

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.