Discord.js - Give role a all channel - discord.js

Question

Hello I would like to create an order (! Giverole) so that it gives the roles (mute) to all the channels of the server or to be made the order.
client.on('message', message => {
if(message.content.startsWith(prefix + "giverole")) {
var mute_role = message.guild.roles.find(r => r.name == 'mute', {READ_MESSAGES: true, SEND_MESSAGES: false})
if (!mute_role) return message.channel.send(`**${message.author.username}**, role not found`)
message.guild.channels.overwritePermissions(channel => channel.addRole(mute_role));
var lock_embed = new Discord.RichEmbed()
.setColor("#ffad33")
.setDescription(":lock: **Salon bloqué pour les gens mute**")
message.channel.send(lock_embed)
thank you in advance

Answer 1

At the fist - try always get role with role ID, its more safely.
If I understand your question correctly and you need a certain role on all channels to establish certain rights. So you can use this code.
client.on('message', message => {
if(message.content.startsWith(prefix + "giverole")) {
let muteRole = message.guild.roles.get('ROLEID')
if (!muteRole) return message.channel.send(`**${message.author.username}**, role not found`)
message.guild.channels.map(channel => {
if(channel.type === 'text') {
channel.overwritePermissions(muteRole, {
VIEW_CHANNEL: true,
SEND_MESSAGES: false
})
.then(console.log)
.catch(console.log);
}
})
let lock_embed = new Discord.RichEmbed()
.setColor("#ffad33")
.setDescription(":lock: **Salon bloqué pour les gens mute**")
message.channel.send(lock_embed)
}
})
```