Question

我正在使用phantomjs，尝试更改输入的值但到目前为止还没有工作

我收到此错误，但是，我试图更改网站进行测试！

TypeError: null is not an object (evaluating 'document.getElementById("1st-ib").setAttribute')

执行命令行是

phantomjs.exe google.js "https://www.google.com.eg" "google"

我的JS代码是

var page = new WebPage(), testindex = 0, loadInProgress = false;
var system = require("system");

page.onConsoleMessage = function(msg) {
  console.log(msg);
};

page.onLoadStarted = function() {
  loadInProgress = true;
  console.log("load started");
};

page.onLoadFinished = function() {
  loadInProgress = false;
  console.log("load finished");
};

phantom.userAgent="Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.1.2987.98 Safari/537.36";

var steps = [
  function() {
    //Load Login Page
    page.open(system.args[1],function (status){
	page.evaluate(function(){
		//document.getElementById('lst-ib').value='text to be displayed' ;
		document.getElementById("1st-ib").setAttribute('value','My default value');
	}
	);
  }
  );
  }, 
  function() {
		page.render(system.args[2]+".png");
  }, 
  function() {

  }
];


interval = setInterval(function() {
  if (!loadInProgress && typeof steps[testindex] == "function") {
    console.log("step " + (testindex + 1));
    steps[testindex]();
    testindex++;
  }
  if (typeof steps[testindex] != "function") {
    console.log("test complete!");
    phantom.exit();
  }
}, 50);

谢谢，

Answer 1

用于更改值的代码行应该在其他函数中，因为需要时间来加载页面以查找输入。

var page = new WebPage(), testindex = 0, loadInProgress = false;
var system = require("system");

page.onConsoleMessage = function(msg) {
  console.log(msg);
};

page.onLoadStarted = function() {
  loadInProgress = true;
  console.log("load started");
};

page.onLoadFinished = function() {
  loadInProgress = false;
  console.log("load finished");
};

page.settings.userAgent="Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.1.2987.98 Safari/537.36";

var steps = [
  function() {
    //Load Login Page
    page.open(system.args[1],function (status){
  }
  );
  },
  function(){
        page.evaluate(function(){
        //document.getElementById('lst-ib').value='text to be displayed' ;
        document.getElementById("1st-ib").setAttribute('value','My default value');
    }
    );
},  
  function() {
        page.render(system.args[2]+".png");
  }, 
  function() {

  }
];


interval = setInterval(function() {
  if (!loadInProgress && typeof steps[testindex] == "function") {
    console.log("step " + (testindex + 1));
    steps[testindex]();
    testindex++;
  }
  if (typeof steps[testindex] != "function") {
    console.log("test complete!");
    phantom.exit();
  }
}, 50);

更改不与我一起使用的输入值[不工作]

1 个答案: