带有呼叫功能的jQuery触发器

Question

我的按钮带有onclick：

 <button   class="tablinks" onclick="openDiv(event, 'default')">{'TEXT_DEFAULT_SETTINGS'|tr}</button>

opendiv函数：

function openDiv(evt, cityName) {
  // Declare all variables
  var i, tabcontent, tablinks;
  // Get all elements with class="tabcontent" and hide them
  tabcontent = document.getElementsByClassName("tabcontent");
  for (i = 0; i < tabcontent.length; i++) {
    tabcontent[i].style.display = "none";
  }
  // Get all elements with class="tablinks" and remove the class "active"
  tablinks = document.getElementsByClassName("tablinks");
  for (i = 0; i < tablinks.length; i++) {
    tablinks[i].className = tablinks[i].className.replace(" active", "");
  }
  // Show the current tab, and add an "active" class to the button that opened the tab
  document.getElementById(cityName).style.display = "block";
  evt.currentTarget.className += " active";
}

如何触发此单击？

Answer 1

尝试：

document.getElementsByClassName("tablinks")[0].click()

Answer 2

您的代码正常工作正常，除非您没有 default作为id的元素。否则您的代码会破裂＆amp;为此语句document.getElementById(cityName).style.display = "block";

给出错误为Uncaught TypeError: Cannot read property 'style' of null

请参见您的代码的下面工作示例：

function openDiv(evt, cityName) {
  // Declare all variables
  var i, tabcontent, tablinks;
  // Get all elements with class="tabcontent" and hide them
  tabcontent = document.getElementsByClassName("tabcontent");
  for (i = 0; i < tabcontent.length; i++) {
    tabcontent[i].style.display = "none";
  }
  // Get all elements with class="tablinks" and remove the class "active"
  tablinks = document.getElementsByClassName("tablinks");
  for (i = 0; i < tablinks.length; i++) {
    tablinks[i].className = tablinks[i].className.replace(" active", "");
  }
  // Show the current tab, and add an "active" class to the button that opened the tab
  document.getElementById(cityName).style.display = "block";
  evt.currentTarget.className += " active";
}

#default {
display:none
}

 <button   class="tablinks" onclick="openDiv(event, 'default')">{'TEXT_DEFAULT_SETTINGS'|tr}</button>
<div id="default">
This is a default div
</div>