vimperatorrc を here doc で 遅延

gistfile1.txt

" plugin load 後実行
" Enter 後、:source 時は、遅延無しで実行
" here doc の ネスト 可能

:js <<END
{
let one= function (f1) liberator.registerObserver("enter", function f2() {f1(); liberator.unregisterObserver("enter", f2);});
let c = commands.addUserCommand(["lazy"], "lazy", function (args, extra) {
    function f() {
        io.source({
            __proto__: extra && extra.setFrom ? extra.setFrom : File("~"),
            read: function () args[0],
            toString: function() this.__proto__.path,
            __noSuchMethod__: function (name, args) ["exists", "isReadable"].indexOf(name) >= 0,
        }, false);
    }
    if (!this.preLoad) f();
    else one(f);
}, {literal:0, hereDoc:true, preLoad: true}, false);
if (c) one(function () c.preLoad = false);
}
END

lazy <<END
" plugin ロード後
js alert(2)
" 遅延読込の here doc
js <<END1
window.setTimeout(function () {
    alert("lazy here doc");
}, 1200);
set grep
END1
" plugin 実装 option
"set grep_scroll_position=auto
END

js alert(1)