js来查询浏览器的大小

js来查询浏览器的大小

我使用Enquire.js和vue.js来查询浏览器的大小并相应地更新两个数据属性。所以,如果我这样做:

ready: function() {
    // Listen for changes in the browser's size
    window.addEventListener("resize",
    enquire.register("screen and (max-width:400px)", {
        match: function() {
            this.displayIsLarge = false;
            this.displayIsSmall = true;
            console.log("the screen is now small");
        },
        unmatch: function() {
            this.displayIsLarge = true;
            this.displayIsSmall = false;
            console.log("the screen is now large");
        }
    })
    );
}

它将在控制台中输出正确的消息(jsfiddlehere),但是它不会更改displayIsLargedisplayIsSmall的值。我错过了什么?

最佳答案

问题在于this的范围。完整的工作代码是:

ready: function() {
    var self = this;
    // Listen for changes in the browser's size
    window.addEventListener("resize",
    enquire.register("screen and (max-width:400px)", {
        match: function() {
            self.displayIsSmall = true;
            self.displayIsLarge = false;
            console.log("the screen is now small");
        },
        unmatch: function() {
            self.displayIsLarge = true;
            self.displayIsSmall = false;
            console.log("the screen is now large");
        }
    })
    );
}

jsfiddlehere

关于javascript - 结合使用Enquire.js和Vue.js来查询浏览器的大小,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/35632482/

10-11 21:52