H5中JS禁用安卓系统物理返回键,微信客户端中也支持

XBack = {};

(function(XBack) {
XBack.STATE = x - back;
XBack.element;

XBack.onPopState = function(event) {
event.state === XBack.STATE && XBack.fire();
XBack.record(XBack.STATE); //初始化事件时，push一下
};

XBack.record = function(state) {
history.pushState(state, null, location.href);
};

XBack.fire = function() {
var event = document.createEvent(Events);
event.initEvent(XBack.STATE, false, false);
XBack.element.dispatchEvent(event);
};

XBack.listen = function(listener) {
XBack.element.addEventListener(XBack.STATE, listener, false);
};

XBack.init = function() {
XBack.element = document.createElement(span);
window.addEventListener(popstate, XBack.onPopState);
XBack.record(XBack.STATE);
};

})(XBack); // 引入这段js文件

XBack.init();
XBack.listen(function() {});