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dabblet.css

#s {
width: 400px;
border: 1px solid red;
display: flex;

justify-content: flex-end;
text-align: left;
}

dabblet.html

<span id='s'>текст <br> длинный текст</span>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}