WPT
wpt / editing / other / join-different-white-space-style-left-line-and-right-paragraph.html?method=backspace&left-white-space=pre-line&right-white-space=pre
Spec: https://w3c.github.io/editing/execCommand.html ↗
Runs: Chrome 155.0.8041.0 (wpt@a1690333b, 2026-09-04) | Firefox 157.0a1 (wpt@2c385f65e, 2026-09-04) | Safari 251 preview (wpt@a1e944e7a, 2026-09-04) | Ladybird 1.0-a7825 (wpt@9298d21d2, 2026-09-04) | Servo Servo 0.6 (wpt@7e3d005d7, 2026-09-03) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 60/60 | 60/60 | 60/60 | 16/60 | 0/60 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre">[]def\nghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre">[]def\nghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre">[]def\nghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre">[]def<br>ghi</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre">[]def<br>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre">[]def<br>ghi</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def\nghi</b></div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def\nghi</b></div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def\nghi</b></div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def<br>ghi</b></div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def<br>ghi</b></div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def<br>ghi</b></div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def</b>ghi\njkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def</b>ghi\njkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def</b>ghi\njkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def</b>ghi<br>jkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def</b>ghi<br>jkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def</b>ghi<br>jkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def</b>\nghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def</b>\nghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def</b>\nghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def</b><br>ghi</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def</b><br>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def</b><br>ghi</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def\n</b>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def\n</b>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def\n</b>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><b>[]def<br></b>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><b>[]def<br></b>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><b>[]def<br></b>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><div>[]def</div>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><div>[]def</div>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><div>[]def</div>ghi</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre">[]def<div>ghi</div></div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre">[]def<div>ghi</div></div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre">[]def<div>ghi</div></div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><div>[]def</div>ghi\njkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><div>[]def</div>ghi\njkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><div>[]def</div>ghi\njkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><div>[]def</div>ghi<br>jkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><div>[]def</div>ghi<br>jkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><div>[]def</div>ghi<br>jkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre">[]def<div>ghi</div>\njkl</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre">[]def<div>ghi</div>\njkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre">[]def<div>ghi</div>\njkl</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre">[]def<div>ghi</div><br>jkl</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre">[]def<div>ghi</div><br>jkl</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre">[]def<div>ghi</div><br>jkl</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><div>[]def\nghi</div>jkl\nmno</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><div>[]def\nghi</div>jkl\nmno</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><div>[]def\nghi</div>jkl\nmno</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre"><div>[]def<br>ghi</div>jkl<br>mno</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre"><div>[]def<br>ghi</div>jkl<br>mno</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre"><div>[]def<br>ghi</div>jkl<br>mno</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre">[]def<div>ghi</div>jkl\nmno</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre">[]def<div>ghi</div>jkl\nmno</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre">[]def<div>ghi</div>jkl\nmno</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div style="white-space:pre">[]def<div>ghi</div>jkl<br>mno</div> | PASS | PASS | PASS | PASS | FAIL | — |
| delete at <span style="white-space:pre-line">abc</span><div class="pre">[]def<div>ghi</div>jkl<br>mno</div> | PASS | PASS | PASS | FAIL | FAIL | — |
| delete at <span class="preLine">abc</span><div style="white-space:pre">[]def<div>ghi</div>jkl<br>mno</div> | PASS | PASS | PASS | PASS | FAIL | — |