In Git you can add a submodule to a repository. This is basically a repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:
- Separate big codebases into multiple repositories.
// Returns a function, that, as long as it continues to be invoked, will not | |
// be triggered. The function will be called after it stops being called for | |
// N milliseconds. If `immediate` is passed, trigger the function on the | |
// leading edge, instead of the trailing. | |
function debounce(func, wait, immediate) { | |
var timeout; | |
return function() { | |
var context = this, args = arguments; | |
clearTimeout(timeout); |
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft
, elem.offsetTop
, elem.offsetWidth
, elem.offsetHeight
, elem.offsetParent
// use JSX with el instead of React.createElement | |
/** @jsx createElement */ | |
const Children = { | |
only(children) { | |
if (children.length > 1 || children.length === 0) { | |
throw new Error('The children must have only one element'); | |
} | |
return children[0]; | |
} |