Ideas for possible improvements for milsymbol

GENERAL

• favor maintainability over time/performance over space/memory
• reduce overall complexity (1,827 branches, 28,534 statements)
• consistently apply ES6 style throughout the code
• replace deprecated String.substr()
• replace == and != with === and !==
• use immutable objects whenever appropriate (incl. Symbol)
• never modify actual parameters
• remove/replace all var declarations
• favor map/reduce over loops
• reduce (global) symbol state as far as possible

SPECIFIC

• drop Canvas2D support (for now)
• define icon parts statically, preferably in JSON definition files
• defer styling as long as possible
• add named styles to icon parts depending on symbol options
• use SVG compliant attributes throughout the code
• hoist default style attributes to SVG namespace
• define icons (composition of icon parts) declaratively (NICE TO HAVE)
• introduce SVG group to scale/transform icon parts
• improve separation of symbol style options and effective style
• remove icon cache
• move SIDC-dependent metadata to JSON configuration (NICE TO HAVE)
• abstract styling over letter and number SIDC (alpha/numeric)

CANCELLED

• IMPRACTICAL - use XML library to generate SVG from JavaScript object
• OVER-ENGINEERED - use simple layout framework for placement/alignment
• IMPRACTICAL - use expression framework for dynamic texts