当我关注一个元素时，更改元素css

当我关注一个元素改变元素css

  <input class="inputTag" type="text" value="">

	//The input button must be placed at the top.
	Otherwise the focus will not work .

  <h1 class="h1Tag">Safin</h1>


	.h1Tag {
      background: gray;
    }

    .inputTag:focus+.h1Tag {
      background: blue;
    }



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