Add docs for .selectFile() and Cypress.Buffer

This is a manual recreation of #4241 for 9.3.0 release

content/_data/plugins.json

@@ -376,13 +376,6 @@
           "keywords": ["dragndrop", "drag", "drop", "commands"],
           "badge": "community"
         },
-        {
-          "name": "cypress-file-upload",
-          "description": "Simple custom command to ease file upload testing",
-          "link": "https://github.com/abramenal/cypress-file-upload",
-          "keywords": ["fileupload", "file", "upload", "commands"],
-          "badge": "community"
-        },
         {
           "name": "cypress-fill-command",
           "description": "A Cypress command for fill inputs",

content/_data/sidebar.json

@@ -636,6 +636,10 @@
               "title": "select",
               "slug": "select"
             },
+            {
+              "title": "selectFile",
+              "slug": "selectfile"
+            },
             {
               "title": "server",
               "slug": "server"
@@ -754,6 +758,10 @@
               "title": "Blob",
               "slug": "blob"
             },
+            {
+              "title": "Buffer",
+              "slug": "buffer"
+            },
             {
               "title": "minimatch",
               "slug": "minimatch"

content/api/commands/check.md

@@ -158,8 +158,8 @@ cy.get('#pick-fruit :checked').should('be.checked').and('have.value', 'apple')
 
 #### The element must first reach actionability
 
-`.check()` is an "action command" that follows all the rules
-[defined here](/guides/core-concepts/interacting-with-elements).
+`.check()` is an "action command" that follows all the rules of
+[Actionability](/guides/core-concepts/interacting-with-elements).
 
 ## Rules
 

content/api/commands/clear.md

@@ -71,8 +71,8 @@ cy.get('textarea').clear().type('Hello, World')
 
 #### The element must first reach actionability
 
-`.clear()` is an "action command" that follows all the rules
-[defined here](/guides/core-concepts/interacting-with-elements).
+`.clear()` is an "action command" that follows all the rules of
+[Actionability](/guides/core-concepts/interacting-with-elements).
 
 ### Documentation
 

content/api/commands/click.md

@@ -177,8 +177,8 @@ cy.get('li:first').click({
 
 #### The element must first reach actionability
 
-`.click()` is an "action command" that follows all the rules
-[defined here](/guides/core-concepts/interacting-with-elements).
+`.click()` is an "action command" that follows all the rules of
+[Actionability](/guides/core-concepts/interacting-with-elements).
 
 ### Focus
 

content/api/commands/dblclick.md

@@ -178,8 +178,8 @@ cy.get('li:first').dblclick({
 
 #### The element must first reach actionability
 
-`.dblclick()` is an "action command" that follows all the rules
-[defined here](/guides/core-concepts/interacting-with-elements).
+`.dblclick()` is an "action command" that follows all the rules of
+[Actionability](/guides/core-concepts/interacting-with-elements).
 
 ## Rules
 

content/api/commands/fixture.md

@@ -57,8 +57,9 @@ supported:
 - `'utf-16le'`
 - `null`
 
-Using `null` explicitly will return the fixture as a `Buffer`, regardless of
-file extension.
+Using `null` explicitly will return the fixture as a
+[`Cypress.Buffer`](/api/utilities/buffer) instance, regardless of file
+extension.
 
 **<Icon name="angle-right"></Icon> options** **_(Object)_**
 
@@ -144,6 +145,7 @@ cy.fixture('images/logo.png', null).then((logo) => {
   // logo will be read as a buffer
   // and should look something like this:
   // Buffer([0, 0, ...])
+  expect(Cypress.Buffer.isBuffer(logo)).to.be.true
 })
 ```
 
@@ -235,7 +237,8 @@ Cypress automatically determines the encoding for the following file types:
 
 For other types of files, they will be read as `utf8` by default, unless
 specified in the second argument of `cy.fixture()`. You can specify `null` as
-the encoding in order to read the file as a `Buffer` instead.
+the encoding in order to read the file as a
+[`Cypress.Buffer`](/api/utilities/buffer) instance instead.
 
 ### `this` context
 

content/api/commands/readfile.md

@@ -46,7 +46,8 @@ supported:
 - `'utf-16le'`
 - `null`
 
-Using `null` explicitly will return the file as a `Buffer`, regardless of file
+Using `null` explicitly will return the file as a
+[`Cypress.Buffer`](/api/utilities/buffer) instance, regardless of file
 extension.
 
 **<Icon name="angle-right"></Icon> options** **_(Object)_**

content/api/commands/rightclick.md

@@ -185,8 +185,8 @@ cy.get('.menu-item').rightclick({
 
 #### The element must first reach actionability
 
-`.rightclick()` is an "action command" that follows all the rules
-[defined here](/guides/core-concepts/interacting-with-elements).
+`.rightclick()` is an "action command" that follows all the rules of
+[Actionability](/guides/core-concepts/interacting-with-elements).
 
 ## Rules
 

content/api/commands/scrollto.md

@@ -139,8 +139,8 @@ cy.get('table').find('tr:last-child').should('be.visible')
 
 ### Actionability
 
-`cy.scrollTo()` is an "action command" that follows all the rules
-[defined here](/guides/core-concepts/interacting-with-elements).
+`cy.scrollTo()` is an "action command" that follows all the rules of
+[Actionability](/guides/core-concepts/interacting-with-elements).
 
 ### Scopes
 

content/api/commands/select.md

@@ -238,8 +238,8 @@ cy.get('select#name option:selected').should('have.text', 'Peter')
 
 ### Actionability
 
-`.select()` is an action command that follows the rules
-[defined here](/guides/core-concepts/interacting-with-elements).
+`.select()` is an action command that follows the rules of
+[Actionability](/guides/core-concepts/interacting-with-elements).
 
 However, passing `{ force: true }` to `.select()` will not override the
 actionability checks for selecting a disabled `<option>` or an option within a