| 1 |
document.addEventListener('DOMContentLoaded', function () { |
| 2 |
document.querySelectorAll('.bkbg-nt-app').forEach(function (root) { |
| 3 |
var opts = JSON.parse(root.dataset.opts || '{}'); |
| 4 |
initNeonText(root, opts); |
| 5 |
}); |
| 6 |
}); |
| 7 |
|
| 8 |
var _typoKeys = { |
| 9 |
family:'font-family', weight:'font-weight', style:'font-style', |
| 10 |
decoration:'text-decoration', transform:'text-transform', |
| 11 |
sizeDesktop:'font-size-d', sizeTablet:'font-size-t', sizeMobile:'font-size-m', |
| 12 |
lineHeightDesktop:'line-height-d', lineHeightTablet:'line-height-t', lineHeightMobile:'line-height-m', |
| 13 |
letterSpacingDesktop:'letter-spacing-d', letterSpacingTablet:'letter-spacing-t', letterSpacingMobile:'letter-spacing-m', |
| 14 |
wordSpacingDesktop:'word-spacing-d', wordSpacingTablet:'word-spacing-t', wordSpacingMobile:'word-spacing-m' |
| 15 |
}; |
| 16 |
function typoCssVarsForEl(el, obj, prefix) { |
| 17 |
if (!obj || typeof obj !== 'object') return; |
| 18 |
Object.keys(_typoKeys).forEach(function (k) { |
| 19 |
var v = obj[k]; |
| 20 |
if (v === undefined || v === '' || v === null) return; |
| 21 |
if (k === 'sizeDesktop' || k === 'sizeTablet' || k === 'sizeMobile') v = v + (obj.sizeUnit || 'px'); |
| 22 |
else if (k === 'lineHeightDesktop' || k === 'lineHeightTablet' || k === 'lineHeightMobile') v = v + (obj.lineHeightUnit || ''); |
| 23 |
else if (k === 'letterSpacingDesktop' || k === 'letterSpacingTablet' || k === 'letterSpacingMobile') v = v + (obj.letterSpacingUnit || 'px'); |
| 24 |
else if (k === 'wordSpacingDesktop' || k === 'wordSpacingTablet' || k === 'wordSpacingMobile') v = v + (obj.wordSpacingUnit || 'px'); |
| 25 |
el.style.setProperty(prefix + _typoKeys[k], String(v)); |
| 26 |
}); |
| 27 |
} |
| 28 |
|
| 29 |
function buildNeonShadow(a, boost) { |
| 30 |
var tube = a.tubeColor || '#00d4ff'; |
| 31 |
var glow = a.glowColor || '#00d4ff'; |
| 32 |
var second = a.secondGlow || '#0055ff'; |
| 33 |
var int = (a.glowIntensity || 3) * (boost || 1); |
| 34 |
var spread = a.glowSpread || 40; |
| 35 |
|
| 36 |
return [ |
| 37 |
'0 0 ' + Math.round(spread * 0.1) + 'px ' + tube, |
| 38 |
'0 0 ' + Math.round(spread * 0.3) + 'px ' + tube, |
| 39 |
'0 0 ' + Math.round(spread * 0.6 * int) + 'px ' + glow, |
| 40 |
'0 0 ' + Math.round(spread * 1.0 * int) + 'px ' + glow, |
| 41 |
'0 0 ' + Math.round(spread * 2.0 * int) + 'px ' + second, |
| 42 |
'0 0 ' + Math.round(spread * 3.0 * int) + 'px ' + second, |
| 43 |
].join(', '); |
| 44 |
} |
| 45 |
|
| 46 |
function initNeonText(root, a) { |
| 47 |
var Tag = a.tag || 'h2'; |
| 48 |
var text = a.text || 'NEON SIGN'; |
| 49 |
var shadow = buildNeonShadow(a); |
| 50 |
|
| 51 |
/* wrap */ |
| 52 |
var wrap = document.createElement('div'); |
| 53 |
wrap.className = 'bkbg-nt-wrap'; |
| 54 |
wrap.style.cssText = [ |
| 55 |
'background:' + (a.backgroundColor || '#0a0a12'), |
| 56 |
'padding:' + (a.paddingV || 64) + 'px ' + (a.paddingH || 48) + 'px', |
| 57 |
'border-radius:' + (a.borderRadius || 16) + 'px', |
| 58 |
'text-align:' + (a.textAlign || 'center'), |
| 59 |
'position:relative', |
| 60 |
'overflow:hidden', |
| 61 |
].join(';'); |
| 62 |
|
| 63 |
/* sign border */ |
| 64 |
if (a.showBorderSign) { |
| 65 |
var border = document.createElement('div'); |
| 66 |
border.className = 'bkbg-nt-border-sign'; |
| 67 |
var br = Math.max(0, (a.borderRadius || 16) - 6); |
| 68 |
border.style.cssText = [ |
| 69 |
'inset:12px', |
| 70 |
'border-color:' + (a.borderSignColor || '#ff0080'), |
| 71 |
'border-radius:' + br + 'px', |
| 72 |
'box-shadow:0 0 12px ' + (a.borderSignColor || '#ff0080') + ',inset 0 0 12px ' + (a.borderSignColor || '#ff0080') + '22', |
| 73 |
].join(';'); |
| 74 |
wrap.appendChild(border); |
| 75 |
} |
| 76 |
|
| 77 |
/* scanlines */ |
| 78 |
if (a.showScanlines) { |
| 79 |
var scanDiv = document.createElement('div'); |
| 80 |
scanDiv.className = 'bkbg-nt-scanlines'; |
| 81 |
wrap.appendChild(scanDiv); |
| 82 |
} |
| 83 |
|
| 84 |
/* text element */ |
| 85 |
var textEl = document.createElement(Tag); |
| 86 |
textEl.className = 'bkbg-nt-text'; |
| 87 |
|
| 88 |
var baseTs = [ |
| 89 |
'color:' + (a.tubeColor || '#00d4ff'), |
| 90 |
'text-shadow:' + shadow, |
| 91 |
'margin:0', |
| 92 |
'display:block', |
| 93 |
'cursor:default', |
| 94 |
'position:relative', |
| 95 |
'z-index:2', |
| 96 |
].join(';'); |
| 97 |
|
| 98 |
/* flicker mode */ |
| 99 |
var flickerMode = a.flickerMode || 'soft'; |
| 100 |
if (flickerMode === 'soft') textEl.classList.add('bkbg-nt-flicker-soft'); |
| 101 |
if (flickerMode === 'classic') textEl.classList.add('bkbg-nt-flicker-classic'); |
| 102 |
|
| 103 |
textEl.style.cssText = baseTs; |
| 104 |
|
| 105 |
/* broken flicker: wrap a single character in a span */ |
| 106 |
if (flickerMode === 'broken') { |
| 107 |
var chars = text.split(''); |
| 108 |
var letterIdx = a.flickerLetter >= 0 && a.flickerLetter < chars.length |
| 109 |
? a.flickerLetter |
| 110 |
: Math.floor(Math.random() * chars.length); |
| 111 |
textEl.innerHTML = chars.map(function (ch, i) { |
| 112 |
if (ch === ' ') return '<span> </span>'; |
| 113 |
if (i === letterIdx) { |
| 114 |
return '<span class="bkbg-nt-broken-letter" style="text-shadow:' + shadow + '">' + ch + '</span>'; |
| 115 |
} |
| 116 |
return '<span>' + ch + '</span>'; |
| 117 |
}).join(''); |
| 118 |
} else { |
| 119 |
textEl.textContent = text; |
| 120 |
} |
| 121 |
|
| 122 |
wrap.appendChild(textEl); |
| 123 |
|
| 124 |
/* subtitle */ |
| 125 |
if (a.showSubText && a.subText) { |
| 126 |
var subEl = document.createElement('p'); |
| 127 |
subEl.className = 'bkbg-nt-sub'; |
| 128 |
var subShadow = buildNeonShadow(a, 0.6); |
| 129 |
subEl.style.cssText = [ |
| 130 |
'color:' + (a.tubeColor || '#00d4ff'), |
| 131 |
'text-shadow:' + subShadow, |
| 132 |
'position:relative', |
| 133 |
'z-index:2', |
| 134 |
].join(';'); |
| 135 |
subEl.textContent = a.subText; |
| 136 |
wrap.appendChild(subEl); |
| 137 |
} |
| 138 |
|
| 139 |
/* glow floor */ |
| 140 |
if (a.showGlowFloor) { |
| 141 |
var floor = document.createElement('div'); |
| 142 |
floor.className = 'bkbg-nt-floor'; |
| 143 |
floor.style.cssText = 'background:radial-gradient(ellipse at center,' + (a.glowColor || '#00d4ff') + '55 0%,transparent 70%);'; |
| 144 |
wrap.appendChild(floor); |
| 145 |
} |
| 146 |
|
| 147 |
root.appendChild(wrap); |
| 148 |
|
| 149 |
/* Typography CSS vars */ |
| 150 |
typoCssVarsForEl(root.parentNode, a.headingTypo, '--bkbg-nt-hd-'); |
| 151 |
typoCssVarsForEl(root.parentNode, a.subtitleTypo, '--bkbg-nt-sb-'); |
| 152 |
|
| 153 |
/* broken: re-randomize letter occasionally for realism */ |
| 154 |
if (flickerMode === 'broken' && a.flickerLetter < 0) { |
| 155 |
setInterval(function () { |
| 156 |
var oldLetter = wrap.querySelector('.bkbg-nt-broken-letter'); |
| 157 |
if (!oldLetter) return; |
| 158 |
var spans = Array.from(textEl.querySelectorAll('span')); |
| 159 |
var noneEmpty = spans.filter(function (s) { return s.textContent.trim(); }); |
| 160 |
if (!noneEmpty.length) return; |
| 161 |
oldLetter.classList.remove('bkbg-nt-broken-letter'); |
| 162 |
var pick = noneEmpty[Math.floor(Math.random() * noneEmpty.length)]; |
| 163 |
pick.classList.add('bkbg-nt-broken-letter'); |
| 164 |
}, 4000 + Math.random() * 4000); |
| 165 |
} |
| 166 |
} |
| 167 |
|
