Gredient-Generator

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1- I've increased the use of "let" insted of "var" which increases the scope of treating variables in every scope possible.

• let body = document.querySelector('body');
• let colorPickers = document.querySelectorAll('.color-picker');
• let colorPicker1 = document.querySelector('.color-picker__container1').firstElementChild;
• let colorPicker2 = document.querySelector('.color-picker__container2').firstElementChild;
• let anglePicker = document.querySelector('.js-angle');
• let gradientCode = document.querySelectorAll('.js-gradient-code');
• let rgbCode = document.querySelectorAll('.js-rgb-code');
• let backgroundCopy = document.querySelector('.js-background-copy');

2- var fixes the scope and bounds the variables.

3- const fixes the value and limits the sope of function.

4- let allows user to change the existing value of the variable and assign new one in the next function.