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_log.js
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_log.js
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class Logging {
enabled = 0;
target = undefined;
constructor() {
this.log = this.log.bind(this);
}
enable(target = undefined) {
this.enabled = 1;
this.target = target;
target.style.display = null; // = show
}
disable() {
this.enabled = 0;
this.target.style.display = "none"; // hide
this.target = undefined;
}
log(...args) {
// javascript classes are cursed so 'this' can be undefined
if (!this.enabled) {
return;
}
const ellog = this.target;
if (ellog) {
for (let m of args) {
ellog.innerHTML += m + "\n";
}
ellog.scrollTop = ellog.scrollHeight;
}
console.info(...args);
}
}
export const logger = new Logging();
export const log = logger.log;