问题
This question already has an answer here:
- Passing variable into page.evaluate - PhantomJS 3 answers
okay so here's my casperjs function :
if(casper.exists(ac2)){
var accountnumber = this.fetchText('div.arabic:nth-child(2) > table:nth-child(1) > tbody:nth-child(1) > tr:nth-child(2) > td:nth-child(2) > a:nth-child(1)');
var redir = accountnumber.substr(1);
casper.then(function() {
var uel = "https://example.ws/send.html?f=" + redir;
this.thenOpen(uel, function() {
casper.wait(10000, function() {
casper.then(function() {
var accountnumber1 = this.fetchText('div.arabic:nth-child(1) > font:nth-child(1)');
var acccc = accountnumber1.split(' ');
system.stdout.writeLine(acccc[3]); // this output a number
var amount = acccc[3];
var result = amount * 0.019;
var result2 = result.toFixed(6);
var fresult = amount - result2;
var needed = fresult.toFixed(3);
system.stdout.writeLine(needed); // this output a number
this.evaluate(function() {
document.getElementById('account').value = '6028';
document.getElementsByName('data')[0].value = needed; // this just does not work even though i know there a number needed in var needed
});
//this.click("input#sbt.button[type='submit']");
casper.wait(10000, function() {
casper.then(function() {
this.capture("capture1.jpg");
var el2 = this.getHTML();
fs.write('result.html', el2, 'w');
});
});
});});
});
});
} else {
this.exit();
}
For some reason i just can't get the variable to send properly to this function :
this.evaluate(function() {
document.getElementById('account').value = '6028';
document.getElementsByName('data')[0].value = needed; // this just does not work even though i know there a number needed in var needed
});
Can anyone help me fix this so the number actualy gets pass properly to evaluate function.
回答1:
Pass your needed variable as an argument of the evaluate() function derived from PhantomJS's evaluate().
You mix the 2 different contexts. In the page DOM environment (inside evaluate()), needed is unknown, because evaluate() is sandboxed.
I set var neededCasperContext = needed; to show you the difference, but of course you can pass it directly.
var neededCasperContext = needed;
this.evaluate(function(neededPageDomContext) {
document.getElementById('account').value = '6028';
document.getElementsByName('data')[0].value = neededPageDomContext;
}, neededCasperContext);
来源：https://stackoverflow.com/questions/22597987/casperjs-passing-variable-to-evaluate-cant-get-it-to-work