json-joy
Version:
Collection of libraries for building collaborative editing apps.
32 lines (31 loc) • 977 B
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.useCaret = void 0;
const tslib_1 = require("tslib");
const React = tslib_1.__importStar(require("react"));
const hooks_1 = require("../hooks");
const useCaret = () => {
const ref = React.useRef(null);
const timer = React.useRef();
(0, hooks_1.useBrowserLayoutEffect)(() => {
const span = ref.current;
if (!span)
return;
clearTimeout(timer.current);
timer.current = setTimeout(() => {
const selection = window.getSelection();
if (!selection)
return;
const range = document.createRange();
range.setStart(span, 0);
range.collapse(true);
selection.removeAllRanges();
selection.addRange(range);
}, 1);
return () => {
clearTimeout(timer.current);
};
});
return ref;
};
exports.useCaret = useCaret;