mirror of
https://github.com/vale981/tridactyl
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21 lines
563 B
TypeScript
21 lines
563 B
TypeScript
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const listeners = new Map<string, Set<any>>()
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/** Register a listener to be called for each message with type */
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export function addListener(type, callback) {
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if (!listeners.get(type)) {
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listeners.set(type, new Set())
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}
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listeners.get(type).add(callback)
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return () => { listeners.get(type).delete(callback) }
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}
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function onMessage(message) {
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if (listeners.get(message.type)) {
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for (let listener of listeners.get(message.type)) {
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listener(message)
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}
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}
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}
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browser.runtime.onMessage.addListener(onMessage)
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