tinytime:简单的日期和时间格式
tinytime:简单的日期和时间格式
JavaScript 日期处理库
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详细介绍
⏰
Tinytime
A straightforward date and time formatter in <800b.
API
tinytime exports a single function that returns a template object. This object has a single method, render
, which takes a Date
and returns a string with the rendered data.
import tinytime from 'tinytime';
const template = tinytime('The time is {h}:{mm}:{ss}{a}.');
template.render(new Date());
// The time is 11:10:20PM.
Substitutions
MMMM
- Full Month (September)MM
- Partial Month (Sep)Mo
- Numeric Month (9) 1YYYY
- Full Year (1992)YY
- Partial Year (92)dddd
- Day of the Week (Monday)DD
- Day of the Month (24)Do
- Day (24th)h
- Hours - 12h formatH
- Hours - 24h formatmm
- Minutes (zero padded)ss
- Seconds (zero padded)a
- AM/PM
1 - you get padded months (09
instead of 9
) by passing in the padMonth
option.
const template = tinytime('{Mo}', { padMonth: true })
Efficiency
tinytime takes an approach similar to a compiler and generates an AST representing your template. This AST is generated when you call the main tinytime
function. This lets you efficiently re-render your template without tinytime having to parse the template string again. That means its important that you aren't recreating the template object frequently.
Here's an example showing the right and wrong way to use tinytime with React.
Don't do this:
function Time({ date }) {
return (
<div>
{tinytime('{h}:{mm}:{ss}{a}').render(date)}
</div>
)
}
Instead, only create the template object once, and just re-render it.
const template = tinytime('{h}:{mm}:{ss}{a}');
function Time({ date }) {
return (
<div>
{template.render(date)}
</div>
)
}
Babel Plugins
Using one of the plugins below, you can resolve this efficiency concern at compile time.
babel-plugin-transform-tinytime
- Hoists tinytime
calls out of the JSX render scope.
babel-plugin-tinytime
- Hoists tinytime
calls out of the current scope, regardless if its inside JSX or a ordinary function scope.