The js code is not well written! I hope the experts can point out the errors or places that can be abbreviated."/> The js code is not well written! I hope the experts can point out the errors or places that can be abbreviated.">
Home >Web Front-end >JS Tutorial >The input box can only enter negative numbers, integers, and 2 decimal places (keyboard pop-up event)
html代码
<input type="text" onkeyup="clearNoNum(this)">
js代码
function clearNoNum(obj) { var str,num,arr,len,bool; obj.style.imeMode ='disabled' //禁止输入法 obj.value = obj.value.replace("-", "$#$").replace(/\-/g, "").replace("$#$","-"); obj.value = obj.value.replace(".", "$#$").replace(/\./g, "").replace("$#$","."); arr = obj.value.substring(0,1); num = /^[0-9]*$/.test(arr); len = obj.value.substring("0",1); if( ((arr == "-") || (num == true && arr !== "0" )) || /^[0-9]*$/.test(obj.value) && len !== "0"){ bool = obj.value.slice(1).indexOf("-"); if(/^[0-9]*$/.test(bool)){ obj.value = null } obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3');// 只能输入两个小数 obj.value = obj.value.replace(/[^\-?\d.]/g, ""); // 清除"数字"和"."和"-"以外的字符 if(obj.value !== "-" && obj.value !== "" & obj.value !== null){ var val = parseFloat(obj.value); if (val >= 100000000000000000) { obj.value = "99999999999999.99"; } console.log(obj.value) //最终值 } }else{ obj.value = null; } }
写的不好!
希望大神们指点
错误或者可以简写的地方
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