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javascripttampermonkey

TextBox update in order from an array?

How would I be able to make it so the TextBox updates in order based on the Array?

I have 5 and 10 in the 'prices' array, I want it to go to 5 and then 10 and so fourth, what's the most efficient way of doing this? Right now it picks a random number in the array.

const pricetext = document.getElementById('ctl00_cphPrice')
var prices = ["5", "10"]

function update() {
pricetext.value = prices[Math.floor(Math.random() * prices.length)];
}

update()
Solution

  • You could take a closure over the index and increment it after assigning and adjust to the length of the array.

    const
    pricetext = document.getElementById('ctl00_cphPrice'),
    prices = ["5", "10"],
    update = (index => () => {
        pricetext.value = prices[index++];
        index %= prices.length;
    })(0);

setInterval(update, 2000);
    <input type="text" id="ctl00_cphPrice" />