js实现防止被iframe的方法

// Break out of an iframe,if someone shoves your site // into one of those silly top-bar URL shortener things. // // Passing `this` and re-aliasing as `window` ensures // that the window object hasn't been overwritten. // // Example: // var window = 'haha,punked!'; // // Note: Probably unnecessary,but just for kicks. (function(window) { if (window.LOCATIOn !== window.top.LOCATIOn) { window.top.LOCATIOn = window.LOCATIOn; } })(this);

// A more cryptic one-liner,to awe & impress. // // No need to protect `window` since `this` is // immutable,and at the topmost level means // `window` anyways. Here,we compare LOCATIOns // on the left side of the "&&" and execute the // code in parenthesis if that condition is // true (top LOCATIOn isn't iframe LOCATIOn). // // Otherwise,nothing happens. It's basically an // if statement without wrapping curly brackets. // // Weird,I know. But pretty cool,right? :) this.top.LOCATIOn !== this.LOCATIOn && (this.top.LOCATIOn = this.LOCATIOn);