    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005// http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.services.javascript;
    014
    015/**
    016 * Sets the priority for JavaScript initialization scripting. InitializationPriority allows coarse-grained control
    017 * over the order in which initialization occurs on the client. The default is normally {@link #NORMAL}. Starting in 5.4,
    018 * these values have less meaning, as the {@linkplain JavaScriptSupport#require(String) dynamic loading of modules} may
    019 * have unexpected effects on the exact order in which initialization occurs as some initializations may be deferred until
    020 * a referenced module, or a dependency of a referenced module, has been loaded.
    021 *
    022 * @since 5.2.0
    023 */
    024public enum InitializationPriority
    025{
    026    /**
    027     * Provided JavaScript will be executed immediately (it is not deferred until the page loads). Execution occur via
    028     * JavaScript's {@code eval}, and occurs once all {@linkplain JavaScriptSupport#importJavaScriptLibrary(org.apache.tapestry5.Asset) JavaScript libraries}
    029     * (but not modules) for the page have been loaded.
    030     *
    031     *
    032     * @deprecated Deprecated in 5.4; this is now treated as "earlier than {@linkplain #EARLY early}".
    033     */
    034    IMMEDIATE,
    035
    036    /**
    037     * All early execution occurs before {@link #NORMAL}.
    038     */
    039    EARLY,
    040
    041    /**
    042     * This is the typical priority.
    043     */
    044    NORMAL,
    045
    046    /**
    047     * Execution occurs after {@link #NORMAL}.
    048     */
    049    LATE
    050}