how to have a variable value for casper.repeat

问题

I want to repeat steps with CasperJS depending on a variable value coming from the page where I run CasperJS.

To get this value, I do something like:

casper.waitForSelector(".xxxx", function () {
myvalue = this.evaluate(function() {
        value = Math.ceil(document.querySelector('#yyy').getAttribute('data-all')/10)-1;
        return value;
    });                 
});

Then I try to do something like:

casper.repeat(myvalue, function() {

but it doesn't work because repeat can't find myvalue variable. Any idea how to achieve something like that?

EDIT

now I try this :

var myvalue = "";                 

casper.waitForSelector(".xxxx", function () {
    myvalue = this.evaluate(function() {
        value = Math.ceil(document.querySelector('#connections').getAttribute('data-num-all')/10)-1;
        return value;
    }); 
});

casper.repeat(myvalue, function() {

Now I didn't get any synthax error but the repeat isn't executed at all (myvalue=49)

回答1:

I think casper.repeat and casper.waitForSelector are executed asynchronously, so repeat() is executed before the waitFor().

Try that :

var myvalue = "";                 

casper.waitForSelector(".xxxx", function () {
    myvalue = this.evaluate(function() {
        value = Math.ceil(document.querySelector('#connections').getAttribute('data-num-all')/10)-1;
        return value;
    }); 
});

casper.then(function(){
    casper.repeat(myvalue, function() {
        this.echo("Here the code to be executed 'myvalue' times");
    });
});

The then() statement wait for the previous waitForSelector() to be executed before executing repeat().

来源：https://stackoverflow.com/questions/24003667/how-to-have-a-variable-value-for-casper-repeat

标签

casperjs