单位转换：px->rem```html px值：转换 rem值： ``` ```js // 750px -> 350p

	px值：<input type="text" />
    <!-- <button onchange="pxToRem()">转换</button> -->
    <input type="button" value="转换" />
    rem值：<input type="text" />

      // 750px -> 350px   font-size:100px
      let ipts = document.querySelectorAll("input");
      console.log(ipts);
      ipts[1].onclick = function () {
        console.log(11);
        const remVal = (parseFloat(ipts[0].value) * 2.343750058593751) / 100;
        ipts[2].value = remVal;
      };

      //   function pxToRem(num) {
      //     const remVal = (num * 2.343750058593751) / 100;
      //     return remVal + "rem";
      //   }
      //   export default pxToRem;