clear_value method
Implementation
Future<Online> clear_value(AbstractSelector selector,
{bool show = true}) async {
if (show) Show.action('clearing', selector.selector);
await (await page).waitForSelector(selector.selector);
await (await page).evaluate('''(selector) => {
document.querySelector(selector).value = '';
//trigger change and input events with bubbles
var inputEvent = new Event('input', {bubbles: true});
var changeEvent = new Event('change', {bubbles: true});
document.querySelector(selector).dispatchEvent(inputEvent);
document.querySelector(selector).dispatchEvent(changeEvent);
}''', args: [selector.selector]);
return this;
}