.executeAsyncScript() Suggest edits
Inject a snippet of JavaScript into the page for execution in the context of the currently selected frame. The executed script is assumed to be asynchronous.
The function to be injected receives the done callback as argument which needs to be called when the asynchronous operation finishes. The value passed to the done callback is returned to the client.
Additional arguments for the injected function may be passed as a non-empty array which will be passed before the done callback.
Asynchronous script commands may not span page loads. If an unload event is fired while waiting for the script result, an error will be returned.
Usage
Parameters
| Name | Type | description |
|---|---|---|
script |
string|function | The function body to be injected. |
args |
Array | An array of arguments which will be passed to the function. |
callbackOptional |
function | Optional callback function to be called when the command finishes. |
Returns
| Type | description |
|---|---|
| * | The script result. |
Example
this.demoTest = function (browser) {
browser.executeAsyncScript(function(done) {
setTimeout(function() {
done(true);
}, 500);
}, function(result) {
// result.value === true
});
browser.executeAsyncScript(function(arg1, arg2, done) {
setTimeout(function() {
done(true);
}, 500);
}, [arg1, arg2], function(result) {
// result.value === true
});
}