使用REST使用rest / spread运算符删除索引

Question

I have the following scenario where I need an index deleted.

JS:

this.state = {
      rangeValue: this.props.rangeSlider && [
        this.props.rangeValue[0],
        this.props.rangeValue[1],
        this.props.rangeValue[2]
      ],
    };


<Range 
   defaultValue={
   this.props.rangeValue[2] ? [...this.state.rangeValue] : [...this.state.rangeValue] //minus last index in my array (this.props.rangeValue[2])
            }
          />

Answer 1

You can remove the last element by using slice

this.state.rangeValue.slice(0,-1);

Your code :

<Range
  defaultValue={
    this.props.rangeValue[2] ? [...this.state.rangeValue] : this.state.rangeValue.slice(0, -1)
  }
/>