slate-edit-code/tests/tab-start-offset/change.js

A Slate plugin to handle code blocks editing.

import simulateKey from '../simulate-key';

export default function(plugin, change) {
    const { value } = change;
    const block = value.document.findDescendant(
        node => node.type == 'code_block'
    );

    change.collapseToStartOf(block).moveOffsetsTo(0);

    return plugin.onKeyDown(simulateKey('tab'), change, {});
}