PhantomJs的例子不工作
PhantomJs example not working?
有人能告诉我为什么下面的例子链接不工作。我甚至把暂停时间加到了12秒。总是显示我=> console.log("'waitFor()' timeout");
链接:https://github.com/ariya/phantomjs/blob/master/examples/waitfor.js
我复制的例子,但不工作。我试图使用"phantomjs"来运行它。有人能告诉我可能的原因是什么吗?
我已经修改了这个脚本,现在它可以工作了:
/**
* Wait until the test condition is true or a timeout occurs. Useful for waiting
* on a server response or for a ui change (fadeIn, etc.) to occur.
*
* @param testFx javascript condition that evaluates to a boolean,
* it can be passed in as a string (e.g.: "1 == 1" or "$('#bar').is(':visible')" or
* as a callback function.
* @param onReady what to do when testFx condition is fulfilled,
* it can be passed in as a string (e.g.: "1 == 1" or "$('#bar').is(':visible')" or
* as a callback function.
* @param timeOutMillis the max amount of time to wait. If not specified, 3 sec is used.
*/
"use strict";
function waitFor(testFx, onReady, timeOutMillis) {
var maxtimeOutMillis = timeOutMillis ? timeOutMillis : 5000, //< Default Max Timout is 3s
start = new Date().getTime(),
condition = false,
interval = setInterval(function() {
if ( (new Date().getTime() - start < maxtimeOutMillis) && !condition ) {
// If not time-out yet and condition not yet fulfilled
condition = (typeof(testFx) === "string" ? eval(testFx) : testFx()); //< defensive code
} else {
if(!condition) {
// If condition still not fulfilled (timeout but condition is 'false')
console.log("'waitFor()' timeout");
phantom.exit(1);
} else {
// Condition fulfilled (timeout and/or condition is 'true')
console.log("'waitFor()' finished in " + (new Date().getTime() - start) + "ms.");
typeof(onReady) === "string" ? eval(onReady) : onReady(); //< Do what it's supposed to do once the condition is fulfilled
clearInterval(interval); //< Stop this interval
}
}
}, 250); //< repeat check every 250ms
};
function click(sel){var event=document.createEvent('MouseEvents');event.initMouseEvent('click',1,1,window,1,0,0,0,0,0,0,0,0,0,null);document.querySelector(sel).dispatchEvent(event);}
var page = require('webpage').create();
// Open Twitter on 'sencha' profile and, onPageLoad, do...
page.open("https://twitter.com/sencha", function (status) {
// Check for page load success
if (status !== "success") {
console.log("Unable to access network");
} else {
page.evaluate(function(click) {click('a[id="signin-link"]');},click)//,click will be available
// Wait for 'signin-dropdown' to be visible
waitFor(function() {
// Check in the page if a specific element is now visible
return page.evaluate(function() {
return $("div#signin-dropdown").is(":visible");
});
}, function() {
console.log("The sign-in dialog should be visible now.");
phantom.exit();
});
}
page.render('sencha.png');
});
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