在phantomjs中打开页面外定义页面评估 [英] define page evaluate outside of page open in phantomjs

问题描述

在打开带有phantomjs的网页的基本示例中，我们在下面的代码中使用open web并评估函数中页面打开时的完成情况。

in the basic example of open a web page with phantomjs we use below code for open web and evaluate when page open complete in a function .

var page = require('webpage').create();
page.open('http://www.sample.com', function() {
  page.includeJs("http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js", function() {
    page.evaluate(function() {
           console.log(document.title);
    });
    phantom.exit()
  });
});

是让我们在page.open回调函数的函数外定义page.evaluate的任何方式我们需要时随时打电话，打开页面之后不会打电话

is any way that let us define page.evaluate in a function out side of page.open callback function for call it any time we need and no just after page open

推荐答案

不确定你究竟是什么意思，但是从我的意思来说从你的例子中可以理解这可能有所帮助：

not sure what exactly do you mean, but from what I've understood from your example this could help maybe:

var page = require('webpage').create();
// document is already initialized
document.title = 'internal call';

page.onConsoleMessage = function (msg, lineNum, sourceId) {
    console.log('PAGE\'S CONSOLE: ' + msg + ' (from line #' + lineNum + ' in "' + sourceId + '")');
};

var func = function () {
    console.log('Title: ', document.title);
}

// calling outside of the page.open:
func();

page.open('http://google.com/', function () {
    page.includeJs("http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js", function () {
        // calling inside:
        page.evaluate(func);
        page.close();
        phantom.exit(0);
    });
});

还有 page.evaluate 关于参数和闭包的函数

Also there is a Note for page.evaluate function about arguments and closures

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