diff --git a/src/components/editor/editor.tsx b/src/components/editor/editor.tsx
index 9b63189bf..7c7082087 100644
--- a/src/components/editor/editor.tsx
+++ b/src/components/editor/editor.tsx
@@ -8,6 +8,7 @@ import { DocumentTitle } from '../common/document-title/document-title'
 import { Splitter } from '../common/splitter/splitter'
 import { InfoBanner } from '../landing/layout/info-banner'
 import { EditorWindow } from './editor-window/editor-window'
+import { editorTestContent } from './editorTestContent'
 import { MarkdownRenderWindow } from './renderer-window/markdown-render-window'
 import { EditorMode } from './task-bar/editor-view-mode'
 import { TaskBar } from './task-bar/task-bar'
@@ -17,62 +18,7 @@ export const Editor: React.FC = () => {
   const { t } = useTranslation()
   const untitledNote = t('editor.untitledNote')
   const editorMode: EditorMode = useSelector((state: ApplicationState) => state.editorConfig.editorMode)
-  const [markdownContent, setMarkdownContent] = useState(`---
-title: Features
-description: Many features, such wow!
-robots: noindex
-tags: codimd, demo, react
-opengraph:
-  title: Features
----
-# Embedding demo
-[TOC]
-
-## MathJax
-You can render *LaTeX* mathematical expressions using **MathJax**, as on [math.stackexchange.com](https://math.stackexchange.com/):
-
-The *Gamma function* satisfying $\\Gamma(n) = (n-1)!\\quad\\forall n\\in\\mathbb N$ is via the Euler integral
-
-$$
-x = {-b \\pm \\sqrt{b^2-4ac} \\over 2a}.
-$$
-
-$$
-\\Gamma(z) = \\int_0^\\infty t^{z-1}e^{-t}dt\\,.
-$$
-
-> More information about **LaTeX** mathematical expressions [here](https://meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference).
-
-## Blockquote
-> Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.
-> Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.
-> [color=red] [name=John Doe] [time=2020-06-21 22:50]
-
-## Slideshare
-{%slideshare mazlan1/internet-of-things-the-tip-of-an-iceberg %}
-
-## Gist
-https://gist.github.com/schacon/1
-
-## YouTube
-https://www.youtube.com/watch?v=KgMpKsp23yY
-
-## Vimeo
-https://vimeo.com/23237102
-
-## Asciinema
-https://asciinema.org/a/117928
-
-## PDF
-{%pdf https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf %}
-
-## Code highlighting
-\`\`\`javascript=
-
-let a = 1
-\`\`\`
-
-`)
+  const [markdownContent, setMarkdownContent] = useState(editorTestContent)
   const isWide = useMedia({ minWidth: 576 })
   const [firstDraw, setFirstDraw] = useState(true)
   const [documentTitle, setDocumentTitle] = useState(untitledNote)
diff --git a/src/components/editor/editorTestContent.ts b/src/components/editor/editorTestContent.ts
new file mode 100644
index 000000000..c47465897
--- /dev/null
+++ b/src/components/editor/editorTestContent.ts
@@ -0,0 +1,55 @@
+export const editorTestContent = `---
+title: Features
+description: Many features, such wow!
+robots: noindex
+tags: codimd, demo, react
+opengraph:
+  title: Features
+---
+# Embedding demo
+[TOC]
+
+## MathJax
+You can render *LaTeX* mathematical expressions using **MathJax**, as on [math.stackexchange.com](https://math.stackexchange.com/):
+
+The *Gamma function* satisfying $\\Gamma(n) = (n-1)!\\quad\\forall n\\in\\mathbb N$ is via the Euler integral
+
+$$
+x = {-b \\pm \\sqrt{b^2-4ac} \\over 2a}.
+$$
+
+$$
+\\Gamma(z) = \\int_0^\\infty t^{z-1}e^{-t}dt\\,.
+$$
+
+> More information about **LaTeX** mathematical expressions [here](https://meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference).
+
+## Blockquote
+> Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.
+> Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.
+> [color=red] [name=John Doe] [time=2020-06-21 22:50]
+
+## Slideshare
+{%slideshare mazlan1/internet-of-things-the-tip-of-an-iceberg %}
+
+## Gist
+https://gist.github.com/schacon/1
+
+## YouTube
+https://www.youtube.com/watch?v=KgMpKsp23yY
+
+## Vimeo
+https://vimeo.com/23237102
+
+## Asciinema
+https://asciinema.org/a/117928
+
+## PDF
+{%pdf https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf %}
+
+## Code highlighting
+\`\`\`javascript=
+
+let a = 1
+\`\`\`
+`