keycloak_theme/src/bin/build-keycloak-theme/generateFtl/template.ftl

<script>const _= 
{
    "url": {
        "loginAction": "${url.loginAction?no_esc}",
        "resourcesPath": "${url.resourcesPath?no_esc}",
        "resourcesCommonPath": "${url.resourcesCommonPath?no_esc}",
        "loginRestartFlowUrl": "${url.loginRestartFlowUrl?no_esc}",
        "loginUrl": "${url.loginUrl?no_esc}"
    },
    "realm": {
        "displayName": "${realm.displayName!''}" || undefined,
        "displayNameHtml": "${realm.displayNameHtml!''}" || undefined,
        "internationalizationEnabled": ${realm.internationalizationEnabled?c},
        "registrationEmailAsUsername": ${realm.registrationEmailAsUsername?c},
    },
    "locale": (function (){

        <#if realm.internationalizationEnabled>

            return {
                "supported": (function(){

                    <#if realm.internationalizationEnabled>

                        var out= [];

                        <#list locale.supported as lng>
                            out.push({ 
                                "url": "${lng.url?no_esc}", 
                                "label": "${lng.label}",
                                "languageTag": "${lng.languageTag}"
                            });
                        </#list>

                        return out;

                    </#if>

                    return undefined;

                })(),
                "current": "${locale.current}"
            };

        </#if>

        return undefined;

    })(),
    "auth": (function (){


        <#if auth?has_content>

            var out= {
                "showUsername": ${auth.showUsername()?c},
                "showResetCredentials": ${auth.showResetCredentials()?c},
                "showTryAnotherWayLink": ${auth.showTryAnotherWayLink()?c},
            };

            <#if auth.showUsername() && !auth.showResetCredentials()>
                Object.assign(
                    out,
                    {
                        "attemptedUsername": "${auth.attemptedUsername}"
                    }
                );
            </#if>

            return out;

        </#if>


        return undefined;

    })(),
    "scripts": (function(){

        var out = [];

        <#if scripts??>
            <#list scripts as script>
                out.push("${script}");
            </#list>
        </#if>

        return out;

    })(),
    "message": (function (){

        <#if message?has_content>

            return { 
                "type": "${message.type}",
                "summary": String.htmlUnescape("${message.summary}")
            };

        </#if>

        return undefined;

    })(),
    "isAppInitiatedAction": (function (){

        <#if isAppInitiatedAction??>
            return true;
        </#if>
        return false;

    })()
}
</script>