参数fullPage默认为true

.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+  // 使用 IntelliSense 了解相关属性。
+  // 悬停以查看现有属性的描述。
+  // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "nodemon",
+      "runtimeExecutable": "nodemon",
+      "program": "${workspaceFolder}/src/server.js",
+      "restart": true,
+      "console": "integratedTerminal",
+      "internalConsoleOptions": "neverOpen"
+    }
+  ]
+}

package.json

@@ -11,6 +11,7 @@
   "author": "so <[email protected]>",
   "license": "ISC",
   "dependencies": {
+    "boolean": "^0.2.0",
     "boom": "^7.2.2",
     "debug": "^4.1.0",
     "koa": "^2.6.1",

src/controller/index.js

@@ -5,6 +5,7 @@ const Screenshot = require('../lib/Screenshot')
 const Boom = require('boom')
 const devices = require('../lib/DeviceDescriptors')
 const deviceNames = devices.map(device => device.name)
+const boolean = require('boolean')
 
 const instance = new Screenshot()
 ;(async () => {
@@ -62,6 +63,7 @@ function checkOption(option, ctx) {
   let style = option.style
   let script = option.script
   screenshot.type = screenshot.type ? screenshot.type : 'png'
+  screenshot.fullPage = screenshot.fullPage === undefined ? true : boolean(screenshot.fullPage)
 
   if (!/^https?:\/\/.+/.test(option.url)) {
     ctx.body = Boom.badRequest('invalid url').output