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// Logs all calls to preventDefault / stopPropagation in an user-friendly way | |
if ( process.env.NODE_ENV !== "production" ) { | |
(function monkeyPatchEventMethods() { | |
const logEventMethodCall = (event,methodName) => { | |
const MinimumMeaninfulSelectors = 3; // how much meaningful items we want in log message | |
const target = event.target; | |
const selector = (function computeSelector() { | |
const parentSelectors = []; | |
let node = target; | |
let minimumSelectors = 0; | |
do { | |
const meaningfulSelector = node.id ? | |
`#${node.id}` : node.classList.length > 0 ? | |
`.${Array.prototype.join.call(node.classList, '.')}` : undefined; | |
if ( meaningfulSelector ) minimumSelectors++; | |
const nodeSelector = `${node.tagName.toLowerCase()}${meaningfulSelector ? meaningfulSelector : ''}`; | |
parentSelectors.unshift(nodeSelector); | |
node = node.parentNode; | |
} while (node && node !== document && minimumSelectors < MinimumMeaninfulSelectors); | |
return parentSelectors.join(" > "); | |
})(); | |
console.debug(`${event.type}.${methodName}() on ${selector}`,event); | |
}; | |
const preventDefault = Event.prototype.preventDefault; | |
Event.prototype.preventDefault = function() { | |
logEventMethodCall(this,'preventDefault'); | |
preventDefault.call(this); | |
}; | |
const stopPropagation = Event.prototype.stopPropagation; | |
Event.prototype.stopPropagation = function() { | |
logEventMethodCall(this,'stopPropagation'); | |
stopPropagation.call(this); | |
}; | |
})(); | |
} |
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