javascript - 如果变量得到删除类

Question

如果有变量 get (SID) 则需要删除现有的类 (forceview)

网址示例：https ://example.com/?SID=eqwe7q7e6868

我正在使用变量并尝试插入显示（无）。

function sid() {
  // Gets a url that includes the `?` character
  var url = "somedomain.net?search";
  if (url.indexOf("?") > 0) {
    // Selects elements with the "forceview" class
    const forceviews = document.getElementsByClassName("forceview");
    // Loops through these elements and removes them from display
    for (let forceview of forceviews){
      forceview.style.display = "none";
    }
    console.log("all `.forceview` elements have been hidden");
  }
}
sid();

span.old-price.sly-old-price.no-display.forceview {
    display: inline !important;
}

<span class="old-price sly-old-price no-display forceview">
  <span class="price-container price-final_price tax weee">
    <span class="price-label">Preço Normal
    </span>
    <span id="old-price-1263-final_price" data-price-amount="19.9" data-price-type="oldPrice" class="price-wrapper ">
      <span class="price">R$19,90</span>
    </span>
  </span>
</span>

代码没有返回错误。

标签： javascripthtmldisplay

Answer 1

document.getElementsByClassName() 不接受 css 选择器。你应该写

document.getElementsByClassName("forceview")[0]

[0] 因为 document.getElementsByClassName 返回一个元素数组。