公共的强制保留两位小数的js方法

//写一个公共的强制保留两位小数的js方法

function toDecimal2 (x) {
  var f = parseFloat(x)
  if (isNaN(f)) {
    return false
  }
  var f = Math.round(x * 100) / 100
  var s = f.toString()
  var rs = s.indexOf(‘.‘)
  if (rs < 0) {
    rs = s.length
    s += ‘.‘
  }
  while (s.length <= rs + 2) {
    s += ‘0‘
  }
  return s
}

//调用演示
console.log( toDecimal2(2121) ); //2121.00
console.log( toDecimal2(2121.123) ); //2121.12
console.log( toDecimal2(2121.126) ); //2121.12

<template>
   <div class="demo">
       <span>{{‘1234.135‘ | toDecimal2}}</span>
   </div>
</template>

<script>
export default {
   name: ‘‘,
   components: {},
   data() {
       return {}
   },
   filters: {

        toDecimal2 (x) {
            var f = parseFloat(x)
            if ( isNaN(f) ) {
                return false
            }
            var f = Math.round(x * 100) / 100
            var s = f.toString()
            var rs = s.indexOf(‘.‘)
            if (rs < 0) {
                rs = s.length
                s += ‘.‘
            }
            while (s.length <= rs + 2) {
                s += ‘0‘
            }
            return s
        }
   },
}
</script>

<style scoped>

</style>