snabbdom/modules/props.js

A virtual DOM library with focus on simplicity, modularity, powerful features and performance.

"use strict";
function updateProps(oldVnode, vnode) {
    var key, cur, old, elm = vnode.elm, oldProps = oldVnode.data.props, props = vnode.data.props;
    if (!oldProps && !props)
        return;
    if (oldProps === props)
        return;
    oldProps = oldProps || {};
    props = props || {};
    for (key in oldProps) {
        if (!props[key]) {
            delete elm[key];
        }
    }
    for (key in props) {
        cur = props[key];
        old = oldProps[key];
        if (old !== cur && (key !== 'value' || elm[key] !== cur)) {
            elm[key] = cur;
        }
    }
}
exports.propsModule = { create: updateProps, update: updateProps };
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = exports.propsModule;
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