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Accept only positive number using Jquery

Updated
1 min read
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Khanh is a full stack web developer with over 15 years of experience developing for the web

Có thể sử dụng Event Handling hoặc Event Helper. Tất nhiên là sử dụng Event Helper thì ngắn hơn rồi :)

//when key is pressed in the textbox $("#quantity").keypress(function (e) { //if the letter is not digit then display error and don't type anything if( e.which!=8 && e.which!=0 && (e.which<48 || e.which>57)) { //display error message $("#errmsg").html("Digits Only").show().fadeOut("slow"); return false; } });

Mình quen viết thế này hơn:

//when key is pressed in the textbox $("#quantity").keypress ( function (e) { //if the letter is not digit then display error and don't type anything if( e.which!=8 && e.which!=0 && (e.which<48 || e.which>57)) { //display error message $("#errmsg").html("Digits Only").show().fadeOut("slow"); return false; } } );

Nguồn: http://roshanbh.com.np/2008/04/textbox-accept-only-numbers-digits.html

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