Starter Emacs init.el for web developers. Save it in your .emacs.d directory, which should be in your home directory.

init.el

;; Don't need buttons in emacs! By running this early we avoid a flash
;; of buttons before they are removed.
(menu-bar-mode -1)
(tool-bar-mode -1)
(scroll-bar-mode -1)
(setq use-dialog-box nil)

;; BORING: Ensure everything is UTF-8 all the time
(prefer-coding-system 'utf-8)
(setq locale-coding-system 'utf-8)
(set-default-coding-systems 'utf-8)
(set-terminal-coding-system 'utf-8)
(set-keyboard-coding-system 'utf-8)
(set-selection-coding-system 'utf-8)
(setq-default buffer-file-coding-system 'utf-8)

;; Treat clipboard input as UTF-8 string first; compound text next, etc.
(setq x-select-request-type '(UTF8_STRING COMPOUND_TEXT TEXT STRING))

(if (string-equal system-type "windows-nt")
    (set-clipboard-coding-system 'utf-16le-dos)
  (set-clipboard-coding-system 'utf-8))

;; Add the fantastic marmalade package repository to your lists to access hundreds of packages
(require 'package)
(setq package-archives '(("gnu" . "http://elpa.gnu.org/packages/")
                         ("melpa" . "https://melpa.org/packages/")))

(dolist (source package-archives)
  (add-to-list 'package-archives source t))

(package-initialize)

(package-refresh-contents)

;; Automatically install a bunch of useful packages. You should look read up about these.
(setq my-packages
      '(
        ido
        json
        magit
        js2-mode
        web-mode
        undo-tree
        expand-region
        multiple-cursors
        markdown-mode
        color-theme-solarized
        ))

(dolist (package my-packages) 
  (unless (package-installed-p package)
    (package-install package)))

;; Fire up the minor modes the theme we want going all the time everywhere
(load-theme 'solarized-light t)
(global-undo-tree-mode)
(ido-mode t)

;; Settings for ido. The most important one is fuzzy matching, like Sublime Text.
(setq
 ido-case-fold t
 ido-enable-prefix nil
 ido-enable-flex-matching t
 ido-create-new-buffer 'always
 ido-use-filename-at-point nil
 ido-max-prospects 10
 
 yas/prompt-functions '(yas/ido-prompt)
 )

;; Some keybindings for the extra packages and improved built-ins
(global-set-key (kbd "C-=") 'er/expand-region)

(global-set-key (kbd "C->") 'mc/mark-next-like-this)
(global-set-key (kbd "C-<") 'mc/mark-previous-like-this)
(global-set-key (kbd "C-c C-<") 'mc/mark-all-like-this)

;; This one is kind of big, it reindents when hitting return. Something you usually need to do manually.
(global-set-key (kbd "RET") 'reindent-then-newline-and-indent)

(global-set-key (kbd "C-x C-b") 'ibuffer)

(global-set-key "\M-s" 'other-window)