Function _assignTo

src/parsetree/features/bind.js:277–294

* Assign a value to a parsed expression target. Delegates to the * expression's own set() method (same contract as the set command), * with bind-specific coercion for classes and boolean attributes.

(runtime, target, ctx, value)

 * with bind-specific coercion for classes and boolean attributes.
 */
function _assignTo(runtime, target, ctx, value) {
    if (target.type === "classRef") {
        var elt = ctx.you || ctx.me;
        if (elt) value ? elt.classList.add(target.className) : elt.classList.remove(target.className);
    } else if (target.type === "attributeRef" && typeof value === "boolean") {
        var elt = ctx.you || ctx.me;
        if (elt) _setAttr(elt, target.name, value);
    } else {
        var lhs = {};
        if (target.lhs) {
            for (var key in target.lhs) {
                var expr = target.lhs[key];
                lhs[key] = expr && expr.evaluate ? expr.evaluate(ctx) : expr;
            }
        }
        target.set(ctx, lhs, value);
    }
}