chrome showModalDialog替代方案没有返回值undefined

[dnsdnsdns001]

Googlechrome浏览器现在彻底抛弃了showModalDialog()方法.现在用HTML5的重新定义.
(function() {
window.spawn = window.spawn || function(gen) {
function continuer(verb, arg) {
var result;
try {
result = generator[verb](arg);
} catch (err) {
return Promise.reject(err);
}
if (result.done) {
return result.value;
} else {
return Promise.resolve(result.value).then(onFulfilled, onRejected);
}
}
var generator = gen();
var onFulfilled = continuer.bind(continuer, 'next');
var onRejected = continuer.bind(continuer, 'throw');
return onFulfilled();
};
window.showModalDialog = window.showModalDialog || function(url, arg, opt) {
url = url || ''; //URL of a dialog
arg = arg || null; //arguments to a dialog
opt = opt || 'box-shadow: inset 10px 3px 6px #ccc;dialogWidth:310px;dialogHeight:438px'; //options: dialogTop;dialogLeft;dialogWidth;dialogHeight or CSS styles
var caller = showModalDialog.caller.toString();
var dialog = document.body.appendChild(document.createElement('dialog'));
dialog.setAttribute('style', opt.replace(/dialog/gi, ''));
dialog.innerHTML = '<a href="#" id="dialog-close" style="position: absolute; top: 0; right: 4px; font-size: 40px;font-weight:900; background:#c0c;color: red; text-decoration: none; outline: none;" title="關閉">×</a><iframe id="dialog-body" src="' + url + '" style="border: 0; width: 800px; height: 468px; border-radius: 5px;box-shadow: inset 10px 3px 6px #ccc;"></iframe>';
document.getElementById('dialog-body').contentWindow.dialogArguments = arg;
document.getElementById('dialog-close').addEventListener('click', function(e) {
e.preventDefault();
dialog.close();
});
dialog.showModal();
//if using yield
if(caller.indexOf('yield') >= 0) {
return new Promise(function(resolve, reject) {
dialog.addEventListener('close', function() {
var returnValue = document.getElementById('dialog-body').contentWindow.returnValue;
return false;
document.body.removeChild(dialog);
resolve(returnValue);
});
});
}
//if using eval
var isNext = false;
var nextStmts = caller.split('\n').filter(function(stmt) {
if(isNext || stmt.indexOf('showModalDialog(') >= 0)
return isNext = true;
return false;
});
dialog.addEventListener('close', function() {
var returnValue = document.getElementById('dialog-body').contentWindow.returnValue;
document.body.removeChild(dialog);
nextStmts[0] = nextStmts[0].replace(/(window\.)?showModalDialog\(.*\)/g, JSON.stringify(returnValue));
eval('{\n' + nextStmts.join('\n'));
});
throw 'Execution stopped until showModalDialog is closed';
};
})();

可是showModalDialog()打开的窗口需要提交表单,根据表单提交成功后跳转到保存成功的提示,关闭showModalDialog窗口后,返回到主页面,根据返回值再做不同的动作,可是一直无法获取返回值,returnValue总是undefined,如何解决?

[业余草]

(function() {
    window.spawn = window.spawn || function(gen) {
        function continuer(verb, arg) {
            var result;
            try {
                result = generator[verb](arg);
            } catch (err) {
                return Promise.reject(err);
            }
            if (result.done) {
                return result.value;
            } else {
                return Promise.resolve(result.value).then(onFulfilled, onRejected);
            }
        }
        var generator = gen();
        var onFulfilled = continuer.bind(continuer, 'next');
        var onRejected = continuer.bind(continuer, 'throw');
        return onFulfilled();
    };
    window.showModalDialog = window.showModalDialog || function(url, arg, opt) {
        url = url || ''; //URL of a dialog
        arg = arg || null; //arguments to a dialog
        opt = opt || 'box-shadow: inset 10px 3px 6px #ccc;dialogWidth:310px;dialogHeight:438px'; //options: dialogTop;dialogLeft;dialogWidth;dialogHeight or CSS styles
        var caller = showModalDialog.caller.toString();
        var dialog = document.body.appendChild(document.createElement('dialog'));
        dialog.setAttribute('style', opt.replace(/dialog/gi, ''));
        dialog.innerHTML = '<a href="#" id="dialog-close" style="position: absolute; top: 0; right: 4px; font-size: 40px;font-weight:900; background:#c0c;color: red; text-decoration: none; outline: none;" title="關閉">×</a><iframe id="dialog-body" src="' + url + '" style="border: 0; width: 800px; height: 468px; border-radius: 5px;box-shadow: inset 10px 3px 6px #ccc;"></iframe>';
        document.getElementById('dialog-body').contentWindow.dialogArguments = arg;
        document.getElementById('dialog-close').addEventListener('click', function(e) {
            e.preventDefault();
            dialog.close();
        });
        dialog.showModal();
        //if using yield
        if(caller.indexOf('yield') >= 0) {
            return new Promise(function(resolve, reject) {
                dialog.addEventListener('close', function() {
                    var returnValue = document.getElementById('dialog-body').contentWindow.returnValue;
                 return false;
                    document.body.removeChild(dialog);
                    resolve(returnValue);
                });
            });
        }
        //if using eval
        var isNext = false;
        var nextStmts = caller.split('\n').filter(function(stmt) {
            if(isNext || stmt.indexOf('showModalDialog(') >= 0)
                return isNext = true;
            return false;
        });
        dialog.addEventListener('close', function() {
            var returnValue = document.getElementById('dialog-body').contentWindow.returnValue;
            document.body.removeChild(dialog);
            nextStmts[0] = nextStmts[0].replace(/(window\.)?showModalDialog\(.*\)/g, JSON.stringify(returnValue));
            eval('{\n' + nextStmts.join('\n'));
        });
        throw 'Execution stopped until showModalDialog is closed';
    };
})();

[业余草]

http://blog.csdn.net/whitechololate/article/details/3474715 http://www.cnblogs.com/Dlonghow/archive/2009/06/04/1496141.html http://bbs.hsw.cn/86932/viewspace-243672.html