How does JavaScript check if it is a Chinese mainland fax or fixed phone number?
Editor to share with you JavaScript how to check whether it is a Chinese mainland fax or fixed phone number, I believe most people do not know much about it, so share this article for your reference, I hope you will get a lot after reading this article, let's go to know it!
Verify whether it is Chinese mainland fax or landline phone number function isFax (str) {
Return / ^ ([0-9] {3magin 4})? [0-9] {7pc8} $| ^ ([0-9] {3pcet 4} -)? [0-9] {7pc8} $/ .test (str)
} what can JavaScript do? It can make web pages interactive, such as responding to user clicks and providing users with a better experience. two。 You can process forms, verify user input, and provide timely feedback to save users time. 3. The page can be created dynamically according to the user's operation. 4 using JavaScript, you can set up some temporary information that cookie stores on the browser.
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