如何在node.js中为对象动态添加属性？

Posted 2023-03-14

【中文标题】如何在node.js中为对象动态添加属性？

【英文标题】：How to dynamically add properties to an object in node.js?

【发布时间】：2021-03-19 09:20:17

【问题描述】：

我有一个对象，我希望能够在其中动态添加至少一个属性。 属性的数量取决于我拥有的数组中的项目。 这是我引用的对象：

const helpEmbedMsg = new global.Discord.MessageEmbed()
                // Display a different (random) color every time the command is used.
                .setColor("RANDOM")
                .setTitle("Help")
                .setAuthor("Beatrice~")
                .setDescription("A full list of the commands available to you..")
                .addFields(
                     name: `The current __prefix__ for this server is:   \`$prefix\``, value: "\u200B" ,
                )
                .addField("???? Here's a list of all my commands:", "\u200B", false)

                .addField("\u200B", "\u200B", false)
                .addField(`Type \`$prefixhelp <command>\` to learn more about a command and it's usage!   `, `Example: \`$prefixhelp ping\``, false)
                .setTimestamp()
                .setFooter(`Command triggered in $message.channel.guild`);

所以，基本上，如果数组的长度是4，我想添加以下内容：

.addField(array[i], "text here", true)

四次，但在对象中的特定位置（顺序很重要），就在这一行的正下方：

.addField("???? Here's a list of all my commands:", "\u200B", false)

【参考方案1】：

所以，只需将代码分成两条链，它们之间有一个for 循环：

const helpEmbedMsg = new global.Discord.MessageEmbed();

helpEmbedMsg.setColor("RANDOM")
    .setTitle("Help")
    .setAuthor("Beatrice~")
    .setDescription("A full list of the commands available to you..")
    .addFields(
         name: `The current __prefix__ for this server is:   \`$prefix\``, value: "\u200B" ,
    )
    .addField("? Here's a list of all my commands:", "\u200B", false);

// add an array of properties in this specific order
for (let item of array) 
    helpEmbedMsg.addField(item, "text here", true);


// add the rest    
helpEmbedMsg.addField("\u200B", "\u200B", false)
    .addField(`Type \`$prefixhelp <command>\` to learn more about a command and it's usage!   `, `Example: \`$prefixhelp ping\``, false)
    .setTimestamp()
    .setFooter(`Command triggered in $message.channel.guild`);