ReactJs 警告:不推荐使用变异`style`.考虑事先克隆它 [英] ReactJs warning: Mutating `style` is deprecated. Consider cloning it beforehand

问题描述

我收到以下警告:

inWarning: `div` 被传递了一个之前已经改变的样式对象.不推荐使用变异的 `style`.考虑事先克隆它.检查`xxx`的`render`.以前的样式:{backgroundColor: "#000000"}.突变样式:{backgroundColor: "#002a09"}.

即使在克隆原始对象后仍尝试将样式属性分配给 div 时(我也尝试使用 JSON.parse(JSON.stringify()) 没有成功).

你能告诉我为什么我会收到这个错误以及如何解决它.

 var clone = Object.assign({}, this.state.selectedColor);this.styles.previewColorHover.backgroundColor = clone.hex

在我的渲染函数中:

<div ref='previewColor' id={'preview-color-' + this.props.id}style={this.styles.previewColorHover}>

解决方案

您不是在克隆 previewColorHover

 var clone = Object.assign({}, this.styles.previewColorHover);this.styles.previewColorHover = 克隆；this.styles.previewColorHover.backgroundColor = this.state.selectedColor.hex

I am receving the following warning:

inWarning: `div` was passed a style object that has previously been mutated. Mutating `style` is deprecated. Consider cloning it beforehand. Check the `render` of `xxx`. Previous style: {backgroundColor: "#000000"}. Mutated style: {backgroundColor: "#002a09"}. 

When trying to assign a style property to a div even after cloning the original object (I have also tried using JSON.parse(JSON.stringify()) with no sucess).

Could you tell me why I am receiving this error and how to fix it.

   var clone = Object.assign({}, this.state.selectedColor);
   this.styles.previewColorHover.backgroundColor = clone.hex

in my render function:

<div ref='previewColor' id={'preview-color-' + this.props.id}
    style={this.styles.previewColorHover}>
</div>

解决方案

You are not cloning the previewColorHover

  var clone = Object.assign({}, this.styles.previewColorHover);
   this.styles.previewColorHover = clone;
   this.styles.previewColorHover.backgroundColor = this.state.selectedColor.hex

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