javascript - 节点休息客户端获取本地变量

Question

我正在尝试执行以下操作：

var id=9;
            client.get("http://localhost:5000/api/produto/{id}", function (data, response) {
                console.log(data);
                console.log("------------");
                console.log(response);
            });

但它说：

{ id: [ 'The value \'{id}\'\' is not valid.' ] }

我想知道如何在获取请求中使用局部变量？我正在请求我所做的一个项目，如果我输入一个数字而不是 id 它可以工作。

Answer 1

尝试

var id=9;
            client.get(`http://localhost:5000/api/produto/${id}`, function (data, response) {
                console.log(data);
                console.log("------------");
                console.log(response);
            });

它被称为模板文字：

来自https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals

Template literals are enclosed by the back-tick (` `)  (grave accent) character instead of double or single quotes. Template literals can contain placeholders. These are indicated by the dollar sign and curly braces (${expression}). The expressions in the placeholders and the text between them get passed to a function. The default function just concatenates the parts into a single string. If there is an expression preceding the template literal (tag here), this is called a "tagged template". In that case, the tag expression (usually a function) gets called with the processed template literal, which you can then manipulate before outputting. To escape a back-tick in a template literal, put a backslash \ before the back-tick.