@glimmer/runtime/dist/commonjs/es2017/lib/references/class-list.js

Minimal runtime needed to render Glimmer templates

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = createClassListRef;

var _reference = require("@glimmer/reference");

var _normalize = require("../dom/normalize");

function createClassListRef(list) {
  return (0, _reference.createComputeRef)(() => {
    let ret = [];

    for (let i = 0; i < list.length; i++) {
      let ref = list[i];
      let value = (0, _normalize.normalizeStringValue)(typeof ref === 'string' ? ref : (0, _reference.valueForRef)(list[i]));
      if (value) ret.push(value);
    }

    return ret.length === 0 ? null : ret.join(' ');
  });
}
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