Home > Article > Web Front-end > js character limit makes one Chinese character count as two characters
Sometimes we need to limit user input or intercept a string of a certain length, and we need to use such functional code. Here, the editor of Script House will share it with you
html
<input type="text" id="txt">
Core js code
//字符串截取 function getByteVal(val, max) { var returnValue = ''; var byteValLen = 0; for (var i = 0; i < val.length; i++) { if (val[i].match(/[^\x00-\xff]/ig) != null) byteValLen += 2; else byteValLen += 1; if (byteValLen > max) break; returnValue += val[i]; } return returnValue; } $('#txt').bind('keyup',function(){ var val=this.value; if(val.replace(/[^\x00-\xff]/g,"**").length>14){ this.value=getByteVal(val,14) } })
Note: jquery binding events are used in the code, so the jquery framework needs to be added.
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