How does taro get components?

how does taro get components

the original Mini Program is through

onReady: function () {
    // 
    this.ecComponent = this.selectComponent("-sharpmychart-dom-bar");
  },

obtained
but Taro does not support

Dec.16,2021

seems to be able to obtain component instances via ref

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3721a-4ecd3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3721a-4ecd3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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