Question

基本上，我正在尝试从节点服务器检索刷新的消息，并且遇到了错误，我试图纠正该错误，以便我可以进一步开发Web应用程序。

我尝试修改代码，甚至在nunjucks文档的帮助下，我还修复了nunjucks格式的所有问题。经过检查，似乎我无法从nunjucks if表达式中运行“ typeof”。

                {% if (typeof messages.error != "undefined") %}
                <div class="alert alert-danger alert-dismissible fade show" role="alert">
                    <strong>Oops!</strong> {{ messages.error }}
                    <button type="button" class="close" data-dismiss="alert" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                <script>console.log("first");</script>
                {% endif %}

app.use(bodyParser.urlencoded({ extended: false }));

app.post('/', function(req, res, next) {
    const url = req.body.url;

    if (!url.startsWith('https://') && !url.startsWith('http://')) {
        req.flash('error', 'That doesn\'t appear to be a valid URL to me.');
    }
    return;
});

我正试图使警报不出现，而不是整个应用程序因错误而崩溃。

Template render error: (e:\Programming\nodejs\invisi.link\views\index.html) [Line 33, Column 23]
  parseAggregate: expected comma after expression
    at Object._prettifyError (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\lib.js:36:11)
    at Template.render (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\environment.js:542:21)
    at e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\environment.js:366:27
    at createTemplate (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\environment.js:315:9)
    at handle (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\environment.js:327:11)
    at e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\environment.js:339:9
    at next (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\lib.js:280:7)
    at Object.asyncIter (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\lib.js:286:3)
    at Environment.getTemplate (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\environment.js:321:9)
    at Environment.render (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\environment.js:360:10)
    at NunjucksView.render (e:\Programming\nodejs\invisi.link\node_modules\nunjucks\src\express-app.js:22:9)
    at tryRender (e:\Programming\nodejs\invisi.link\node_modules\express\lib\application.js:640:10)
    at Function.render (e:\Programming\nodejs\invisi.link\node_modules\express\lib\application.js:592:3)
    at ServerResponse.render (e:\Programming\nodejs\invisi.link\node_modules\express\lib\response.js:1012:7)
    at e:\Programming\nodejs\invisi.link\index.js:26:9
    at Layer.handle [as handle_request] (e:\Programming\nodejs\invisi.link\node_modules\express\lib\router\layer.js:95:5)
    at next (e:\Programming\nodejs\invisi.link\node_modules\express\lib\router\route.js:137:13)
    at Route.dispatch (e:\Programming\nodejs\invisi.link\node_modules\express\lib\router\route.js:112:3)
    at Layer.handle [as handle_request] (e:\Programming\nodejs\invisi.link\node_modules\express\lib\router\layer.js:95:5)
    at e:\Programming\nodejs\invisi.link\node_modules\express\lib\router\index.js:281:22
    at Function.process_params (e:\Programming\nodejs\invisi.link\node_modules\express\lib\router\index.js:335:12)
    at next (e:\Programming\nodejs\invisi.link\node_modules\express\lib\router\index.js:275:10)```

Express.js和Nunjucks的模板渲染错误

0 个答案: