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template literals with a style tag, fixes #341

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This commit is contained in:
Toon Baeyens 2020-03-30 12:33:28 +02:00
parent 797461ee32
commit 7d238e2ebb
2 changed files with 13 additions and 0 deletions
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5
source/index.js
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@ -134,6 +134,11 @@ const createStyler = (open, close, parent) => {
const createBuilder = (self, _styler, _isEmpty) => {
const builder = (...arguments_) => {
if (Array.isArray(arguments_[0])) {
// Called as a template litteral, e.g. chalk.red`2 + 3 = {bold ${2+3}}`
return applyStyle(builder, chalkTag(builder, ...arguments_));
}
// Single argument is hot path, implicit coercion is faster than anything
// eslint-disable-next-line no-implicit-coercion
return applyStyle(builder, (arguments_.length === 1) ? ('' + arguments_[0]) : arguments_.join(' '));

8
test/template-literal.js
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@ -30,6 +30,14 @@ test('correctly perform template substitutions', t => {
instance.bold('Hello,', instance.cyan.inverse(name + '!'), 'This is a') + ' test. ' + instance.green(exclamation + '!'));
});
test('correctly perform nested template substitutions', t => {
const instance = new chalk.Instance({level: 0});
const name = 'Sindre';
const exclamation = 'Neat';
t.is(instance.bold`Hello, {cyan.inverse ${name}!} This is a` + ' test. ' + instance.green`${exclamation}!`,
instance.bold('Hello,', instance.cyan.inverse(name + '!'), 'This is a') + ' test. ' + instance.green(exclamation + '!'));
});
test('correctly parse and evaluate color-convert functions', t => {
const instance = new chalk.Instance({level: 3});
t.is(instance`{bold.rgb(144,10,178).inverse Hello, {~inverse there!}}`,