Javascriptで指定した配列の要素を削除する ref: https://qiita.com/Sekky0905/items/598b47fea2106b8c140e

file0.js

const array = [0, 1, 2, 3, 4];

console.log(`before : array = ${array}`);

array.forEach((item, index) => {
    if(item === 1) {
        array.splice(index, 1);
    }
});

console.log(`after : array = ${array}`);

file1.txt

before : array = 0,1,2,3,4
after : array = 0,2,3,4

file2.js

const array = [0, 1, 2, 3, 4];
console.log(`before: array = ${array}`);

const newArray = array.filter(n => n !== 1);

console.log(`after: array = ${newArray}`);

file3.txt

before : array = 0,1,2,3,4
after : array = 0,2,3,4