如何修改这个read more js
How to modify this read more js
http://jsfiddle.net/raininglemons/wutu9k7k/
(function () {
var buttons = document.getElementsByTagName("button");
for (var i = 0; i < buttons.length; i++) {
// Find .readmore parent
var parent = buttons[i].parentElement;
while (parent !== null && !parent.className.match("readmore"))
parent = parent.parentElement;
// Reached top of dom tree and didn't find .readmore element
if (parent === null)
continue;
buttons[i].addEventListener("click", function (event) {
// Cancel default button behaviour
event.preventDefault();
// Add .showall class to parent
parent.className = parent.className + " showall";
});
}
})();
这只显示所有内容,按钮消失。我也希望通过按下相同的按钮来隐藏内容,只是为了回到原始状态。
更新
根据@cmorrissey的建议,我已经将条件更改为在几个类的情况下更通用。
更新了fiddle。
经过两次更改后,您的代码运行良好。
第一:删除以下在单击后隐藏按钮的样式:
/* hide button when revealing all */
.readmore.showall button {
display: none;
}
第二:在click
事件中添加条件以检入show_all
类是否已在父div
中:
buttons[i].addEventListener("click", function (event) {
// Cancel default button behaviour
event.preventDefault();
// Add .showall class to parent
if(!parent.className.match("showall")){
parent.className = parent.className + " showall";
this.innerText = "Read less"; //Optionally if you want to change
} else {
parent.className = parent.className.replace("showall", "");
this.innerText = "Read more"; //Optionally if you want to change
}
});
希望这能有所帮助。
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