A brief analysis of the operation methods of child windows and parent windows in jQuery

With the development of the Internet, web pages are paying more and more attention to user experience, and jQuery, as an excellent JavaScript library, brings great convenience to front-end development. In web pages, the interaction between child windows and parent windows is often used. Let’s introduce jQuery’s child window and parent window methods.

1. Sub-window operation

1. Open the sub-window

When opening a sub-window, we usually use window.open(), which can pass four parameters , respectively:

window.open(URL,name,features,replace);

Among them, URL is the address of the sub-window; name is the name of the sub-window, which can be specified when opening a new window; features is an optional string parameter, specifying the properties of the window, such as The size, position of the window, whether there is a toolbar, etc.; replace specifies whether to add the URL to the history.

Sample code:

window.open("child.html","childWindow","height=200,width=200");

2. Close the child window

In the child window, we can use the window.close() method to close the current window.

Sample code:

<button onclick="window.close()">关闭当前窗口</button>

3. Call the parent window method in the child window

In the child window, we can get the object of the parent window through window.opener, and call its methods.

Sample code:

Parent window:

function showMessage(message){
    alert(message);
}

Child window:

window.opener.showMessage("Hello,world!");

2. Parent window operation

1. Get the child Window object

In the parent window, we can obtain the opened child window object through the window object returned by the window.open() method.

Sample code:

var childWindow = window.open("child.html","childWindow","height=200,width=200");

2. Call the child window method in the parent window

In the parent window, we can call the method in the child window that has been opened.

Sample code:

Parent window:

function changeColor(color){
    childWindow.document.body.style.backgroundColor = color;
}

Child window:

<button onclick="window.opener.changeColor(&#39;red&#39;)">变红色</button>

3. Get child window data in the parent window

In the parent window, we can obtain the data of the child window through the window object of the child window.

Sample code:

Parent window:

var childWindow = window.open("child.html","childWindow","height=200,width=200");

setTimeout(function(){
    var childData = childWindow.document.getElementById("data").innerHTML;
    alert(childData);
},2000);

Child window:

<div id="data">子窗口数据</div>

Summary:

Through the above introduction, we can see It turns out that jQuery's child window and parent window methods are very simple, but they realize the interaction between child windows and parent windows in web pages, providing more possibilities for user experience. In actual projects, if the interaction between the child window and the parent window is needed, developers can use the above method to achieve it.

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