DiscordMinesweeper.js

// Minesweeper generator for Discord messages. Idea and emotes were peeped from SKrshe and kjagodka.
// How to use:
//   Paste this code into browser's console and press Enter (it will put message with game into clipboard).
//   Paste and post message in Discord.
// You can change width, height and number of mines.
// But Discord has limit of number of emotes: 199 - (number of spoilers). So 10 by 10 field is impossible.
const width = 11
const height = 9
let numberOfMines = 17
if (width * height > 99) throw new Error("Field is too big! Please, make width or height smaller.")
if (width * height < numberOfMines) throw new Error("Too many mines! Max is " + width * height)
const textures = "blue_square one two three four five six seven eight boom".split(" ")
const map = new Array(height).fill(0)
    .map(_ => new Array(width).fill(false))
while (numberOfMines > 0) {
    console.log("attempts to place a mine were made")
    const x = Math.floor(Math.random() * width)
    const y = Math.floor(Math.random() * height)
    if (!map[y][x]) {
        map[y][x] = true
        numberOfMines--
    }
}
const mapCounts = new Array(height).fill(0)
    .map(_ => new Array(width).fill(0))
for (let y = 0; y < height; y++) {
    for (let x = 0; x < width; x++) {
        if (map[y][x]) mapCounts[y][x] = 9
        else mapCounts[y][x] = countMines(x, y)
    }
}

function countMines(x, y) {
    let result = 0
    for (let j = -1; j < 2; j++) {
        for (let i = -1; i < 2; i++) {
            if (i === 0 && j === 0) continue
            result += map[y + j]?.[x + i] ? 1 : 0
        }
    }
    return result
}
const discordMessage = mapCounts.map(row =>
    row.map(cell => `||:${textures[cell]}:||`).join("")
).join("\n")
copy(discordMessage)
// copy(mapCounts.map(row => row.map(cell => `:${textures[cell]}:`).join("") ).join("\n")) // Solution