vue input框数字后保留两位小数正则

<el-input type="text" v-model.trim="ruleForm2.marketPrice" maxlength="10" @keyup.native="ruleForm2.marketPrice =ruleForm2.marketPrice = ruleForm2.marketPrice.replace(/[^\d.]/g,''); ruleForm2.marketPrice = ruleForm2.marketPrice.replace(/\.{2,}/g,'.'); ruleForm2.marketPrice = ruleForm2.marketPrice.replace(/^\./g,''); ruleForm2.marketPrice = ruleForm2.marketPrice.replace('.','$#$').replace(/\./g,'').replace('$#$','.'); ruleForm2.marketPrice = ruleForm2.marketPrice.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3'); " ></el-input>    

function clearNoNum(obj)

{

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//先把非数字的都替换掉，除了数字和.

obj.value = obj.value.replace(/[^\d.]/g,"");

//保证只有出现一个.而没有多个.

obj.value = obj.value.replace(/\.{2,}/g,".");

//必须保证第一个为数字而不是.

obj.value = obj.value.replace(/^\./g,"");

//保证.只出现一次，而不能出现两次以上

obj.value = obj.value.replace(".","$#$").replace(/\./g,"").replace("$#$",".");

//只能输入两个小数

obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3');

}

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