fohow_xcx/component/filter/filter.js

Component({
  properties: {
    symbol: {
      type: String,
      value: '',
      observer: 'formatNumber'
    },
    value: {
      type: Number,
      observer: 'formatNumber'
    }
  },
  data: {
    filter: ''
  },
  ready: function (options) {
    this.formatNumber(this.data.value)
  },
  methods: {
    formatNumber (num) { 
    if (isNaN(num)) { 
      throw new TypeError("num is not a number"); 
    }
    var price = ("" + num).replace(/(\d{1,3})(?=(\d{3})+(?:$|\.))/g, "$1,")
    this.setData({
     filter: price
    })
    // return ("" + num).replace(/(\d{1,3})(?=(\d{3})+(?:$|\.))/g, "$1,");  
    },
  }
})