mirror of
https://github.com/oven-sh/bun
synced 2026-02-09 10:28:47 +00:00
0f7494569e
## Summary
- Implements the `%j` format specifier for `console.log` and related
console methods
- `%j` outputs the JSON stringified representation of the value
- Previously, `%j` was not recognized and was left as literal text in
the output
## Test plan
- [x] Run `bun bd test test/regression/issue/24234.test.ts` - all 5
tests pass
- [x] Verify tests fail with system Bun (`USE_SYSTEM_BUN=1`) to confirm
fix validity
- [x] Manual verification: `console.log('%j', {foo: 'bar'})` outputs
`{"foo":"bar"}`
## Example
Before (bug):
```
$ bun -e "console.log('%j %s', {foo: 'bar'}, 'hello')"
%j [object Object] hello
```
After (fixed):
```
$ bun -e "console.log('%j %s', {foo: 'bar'}, 'hello')"
{"foo":"bar"} hello
```
Closes #24234
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
243 lines
3.7 KiB
Plaintext
243 lines
3.7 KiB
Plaintext
{
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a: "",
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}
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Hello World!
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0
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-0
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123
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-123
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123.567
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-123.567
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true
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false
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null
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undefined
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Infinity
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-Infinity
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Symbol(Symbol Description)
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2000-06-27T02:24:34.304Z
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[String: "Hello"]
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[String: "Hello 👋🏼"]
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[Number: 5]
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[Boolean: true]
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[ 123, 456, 789 ]
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{
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name: "foo",
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}
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{
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a: 123,
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b: 456,
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c: 789,
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}
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1.7976931348623157e+308
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5e-324
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9e+59
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0.3
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0.29999999999999993
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{
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a: {
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b: {
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c: 123,
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},
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bacon: true,
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},
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name: "bar",
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}
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Promise { <pending> }
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{}
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[Function]
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[Function]
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[class Foo]
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[class (anonymous)]
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Foo {}
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FooWithProp {
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a: 1,
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}
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[Function: foooo]
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/FooRegex/
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Is it a bug or a feature that formatting numbers like 123 is colored
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String 123 should be 2nd word, 456 == 456 and percent s %s == What okay
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123456 without space should work
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{
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foo: {
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name: "baz",
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},
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bar: [Circular],
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} am
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[
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{}, {}, {}, {}
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]
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{
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level1: {
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level2: {
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level3: [Object ...],
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},
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},
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}
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{
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"1": [Object ...],
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}
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{
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"1": [Object ...],
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}
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{
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"1": {
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"2": [Object ...],
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},
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}
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{
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"1": {
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"2": {
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"3": 3,
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},
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},
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}
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{
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"1": [Object ...],
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}
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{
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"1": [Object ...],
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}
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SetIterator {
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1,
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"123",
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{
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a: [],
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str: "123123132",
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nr: 3453,
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},
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}
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SetIterator {
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1,
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"123",
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{
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a: [],
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str: "123123132",
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nr: 3453,
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},
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}
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SetIterator { } SetIterator { }
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MapIterator {
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"key",
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"key_2",
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}
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MapIterator {
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{
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a: [],
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str: "123123132",
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nr: 3453,
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},
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{
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b: "test",
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},
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}
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MapIterator { } MapIterator { }
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NestedClass {
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a: 1,
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b: 2,
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foo: FooWithProp {
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a: 1,
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},
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test: [Function: test],
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}
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myCustomName {
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[Symbol(Symbol.toStringTag)]: "myCustomName",
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}
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{
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"0": 1,
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"1": 2,
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"2": 3,
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"3": 4,
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length: 4,
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}
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[ 1, 2, 3 ]
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[ empty item, 2, empty item ]
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[ 1, 2, empty item ]
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[ 1, 2, 3 ]
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[ 2 x empty items, 3 ]
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[ 1, 2 x empty items ]
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[
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1, 2, empty item, 4, 38 x empty items
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]
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[
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1, empty item, 4, 39 x empty items
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]
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[
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42 x empty items
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]
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[
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1024 x empty items
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]
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[
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"i0", empty item, "i2", "i3", "i4", "i5", "i6", "i7", "i8", "i9", "i10", "i11", "i12", "i13", "i14", "i15", "i16",
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"i17", "i18", "i19", "i20", "i21", "i22", "i23", "i24", "i25", "i26", "i27", "i28", "i29", "i30", "i31", "i32",
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"i33", "i34", "i35", "i36", "i37", "i38", "i39", "i40", "i41", "i42", "i43", "i44", "i45", "i46", "i47", "i48",
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"i49", "i50", "i51", "i52", "i53", "i54", "i55", "i56", "i57", "i58", "i59", "i60", "i61", "i62", "i63", "i64",
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"i65", "i66", "i67", "i68", "i69", "i70", "i71", "i72", "i73", "i74", "i75", "i76", "i77", "i78", "i79", "i80",
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"i81", "i82", "i83", "i84", "i85", "i86", "i87", "i88", "i89", "i90", "i91", "i92", "i93", "i94", "i95", "i96",
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"i97", "i98", "i99", "i100",
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... 923 more items
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]
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{
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a: 42,
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length: 0,
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}
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{
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"1": 42,
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length: 1,
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}
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{
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"": "",
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}
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{
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hello: 2,
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}
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<Revoked Proxy>
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[
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[
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[
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[
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[
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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4, 4, 4, 4,
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... 900 more items
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]
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]
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]
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]
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]
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custom inspect
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| 0 | 0 | 132 | -42 | 4 | -8 |
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| NaN | NaN | NaN | 0 | NaN | NaN |
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| 0 | 0 | 132 | -42 | -4 | 8 |
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| NaN | NaN | NaN | 0 | NaN | NaN |
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4
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| 0 | 0.2 | 132.51 | -42.52 | 4.127888538432189e+22 | -8.5e-12 |
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| NaN | Infinity | -Infinity | 0 | NaN | NaN |
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0.5 | 0.005
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0
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504252
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-491952
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8589934592
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-8589934592
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0.0005
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-0.0005
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1.7976931348623157e+308 1
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-1.7976931348623157e+308 1
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5e-324 4
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-5e-324 4
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5e-324 9
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-5e-324 4
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0.30000000000000004
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Hello World 123
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Hello %vWorld 123
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Hello NaN %i
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Hello NaN % 1
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Hello NaN 1
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Hello \5 6,
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Hello %i 5 6
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%d 1
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