Puppeteer cheat sheet

gistfile1.txt

// Puppeteer cheat sheet
// gonna try and do for puppeteer what capybara got: https://gist.github.com/zhengjia/428105



// to delete an input value
function DeleteInput(page, inputSelector, word){
	// input must be focused
	page.type(inputSelector, '')
	for (let i = 0; i < word.length; ++i) {
		page.keyboard.down('Backspace');
	}
}

// is element visible by selector
	const isVisible = await page.evaluate(() => {
		const e = document.querySelector('#join');
		if (!e){
	  		return false;
		}
		const style = window.getComputedStyle(e);
		return style && style.display !== 'none' && style.visibility !== 'hidden' && style.opacity !== '0';
	});
	console.log(isVisible)
	
	
	
// to make sure an element is visible, USE: waitForElemToBeVisible(page, selector);

async function isVisible(page, selector){
	const isVisible = await page.evaluate(
		(selector) => {
			const e = document.querySelector(selector);
			if (!e){
				return false;
				}
			const style = window.getComputedStyle(e);
			lala = style && style.display !== 'none' && style.visibility !== 'hidden' && style.opacity !== '0';
			return style && style.display !== 'none' && style.visibility !== 'hidden' && style.opacity !== '0';
		}
	, selector);
	return isVisible
}

async function waitForElemToBeVisible(page, selector){
	console.log('1. starting fun');
	let isItVisible = false; 
	while(!isItVisible) {
		isItVisible = await isVisible(page, selector);
		await new Promise(r => setTimeout(r, 2000));
	}
}