web-worker-helper
Version:
Utilities for running tasks on worker threads
32 lines (31 loc) • 1.09 kB
JavaScript
/**
* Safely stringify JSON (drop non serializable values like functions and regexps)
* @param value
*/
export function removeNontransferableOptions(object) {
// options.log object contains functions which cannot be transferred
// TODO - decide how to handle logging on workers
// TODO - warn if options stringification is long
return JSON.parse(stringifyJSON(object));
}
function stringifyJSON(v) {
var cache = new Set();
return JSON.stringify(v, function (key, value) {
if (typeof value === 'object' && value !== null) {
if (cache.has(value)) {
// Circular reference found
try {
// If this value does not reference a parent it can be deduped
return JSON.parse(JSON.stringify(value));
}
catch (err) {
// discard key if value cannot be deduped
return undefined;
}
}
// Store value in our set
cache.add(value);
}
return value;
});
}