Live demos

fleuron claims a book paginates in hundreds of milliseconds, and that the preview matches the export. You can check both on your own machine, so check them here.

Everything below runs the real engine, compiled to WebAssembly, in a worker. The worker owns the module and never touches an element. The page owns the DOM and never sees the engine. What crosses between them is a display structure, and the SVG on screen is painted from it.

The playground

A chapter of Pride and Prejudice and the stylesheet that sets it. Change either and the book is laid out again, a fifth of a second after you stop typing. You can close the stylesheet editor from the settings. What you end up with is in the URL, so a question about the CSS subset can be a link.

ManuscriptStylesheet

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Manuscript, as markdown--- title: The King of Elfland's Daughter author: Lord Dunsay year: 1924 ---  ## CHAPTER I ### _The Plan of the Parliament of Erl_ In their ruddy jackets of leather that reached to their knees the men of Erl appeared before their lord, the stately white-haired man in his long red room. He leaned in his carven chair and heard their spokesman. And thus their spokesman said. "For seven hundred years the chiefs of your race have ruled us well; and their deeds are remembered by the minor minstrels, living on yet in their little tinkling songs. And yet the generations stream away, and there is no new thing." "What would you?" said the lord. "We would be ruled by a magic lord," they said. "So be it," said the lord. "It is five hundred years since my people have spoken thus in parliament, and it shall always be as your parliament saith. You have spoken. So be it." And he raised his hand and blessed them and they went. They went back to their ancient crafts, to the fitting of iron to the hooves of horses, to working upon leather, to tending flowers, to ministering to the rugged needs of Earth; they followed the ancient ways, and looked for a new thing. But the old lord sent a word to his eldest son, bidding him come before him. And very soon the young man stood before him, in that same carven chair from which he had not moved, where light, growing late, from high windows, showed the aged eyes looking far into the future beyond that old lord's time. And seated there he gave his son his commandment. "Go forth," he said, "before these days of mine are over, and therefore go in haste, and go from here eastwards and pass the fields we know, till you see the lands that clearly pertain to faery; and cross their boundary, which is made of twilight, and come to that palace that is only told of in song." "It is far from here," said the young man Alveric. "Yes," answered he, "it is far." "And further still," the young man said, "to return. For distances in those fields are not as here." "Even so," said his father. "What do you bid me do," said the son, "when I come to that palace?" And his father said: "To wed the King of Elfland's daughter." The young man thought of her beauty and crown of ice, and the sweetness that fabulous runes had told was hers. Songs were sung of her on wild hills where tiny strawberries grew, at dusk and by early starlight, and if one sought the singer no man was there. Sometimes only her name was sung softly over and over. Her name was Lirazel. She was a princess of the magic line. The gods had sent their shadows to her christening, and the fairies too would have gone, but that they were frightened to see on their dewy fields the long dark moving shadows of the gods, so they stayed hidden in crowds of pale pink anemones, and thence blessed Lirazel. "My people demand a magic lord to rule over them. They have chosen foolishly," the old lord said, "and only the Dark Ones that show not their faces know all that this will bring: but we, who see not, follow the ancient custom and do what our people in their parliament say. It may be some spirit of wisdom they have not known may save them even yet. Go then with your face turned towards that light that beats from fairyland, and that faintly illumines the dusk between sunset and early stars, and this shall guide you till you come to the frontier and have passed the fields we know." Then he unbuckled a strap and a girdle of leather and gave his huge sword to his son, saying: "This that has brought our family down the ages unto this day shall surely guard you always upon your journey, even though you fare beyond the fields we know." And the young man took it though he knew that no such sword could avail him. Near the Castle of Erl there lived a lonely witch, on high land near the thunder, which used to roll in Summer along the hills. There she dwelt by herself in a narrow cottage of thatch and roamed the high fields alone to gather the thunderbolts. Of these thunderbolts, that had no earthly forging, were made, with suitable runes, such weapons as had to parry unearthly dangers. And alone would roam this witch at certain tides of Spring, taking the form of a young girl in her beauty, singing among tall flowers in gardens of Erl. She would go at the hour when hawk-moths first pass from bell to bell. And of those few that had seen her was this son of the Lord of Erl. And though it was calamity to love her, though it rapt men's thoughts away from all things true, yet the beauty of the form that was not hers had lured him to gaze at her with deep young eyes, till—whether flattery or pity moved her, who knows that is mortal?—she spared him whom her arts might well have destroyed and, changing instantly in that garden there, showed him the rightful form of a deadly witch. And even then his eyes did not at once forsake her, and in the moments that his glance still lingered upon that withered shape that haunted the hollyhocks he had her gratitude that may not be bought, nor won by any charms that Christians know. And she had beckoned to him and he had followed, and learned from her on her thunder-haunted hill that on the day of need a sword might be made of metals not sprung from Earth, with runes along it that would waft away, certainly any thrust of earthly sword, and except for three master-runes could thwart the weapons of Elfland. As he took his father's sword the young man thought of the witch. It was scarcely dark in the valley when he left the Castle of Erl, and went so swiftly up the witch's hill that a dim light lingered yet on its highest heaths when he came near the cottage of the one that he sought, and found her burning bones at a fire in the open. To her he said that the day of his need was come. And she bade him gather thunderbolts in her garden, in the soft earth under her cabbages. And there with eyes that saw every minute more dimly, and fingers that grew accustomed to the thunderbolts' curious surfaces, he found before darkness came down on him seventeen: and these he heaped into a silken kerchief and carried back to the witch. On the grass beside her he laid those strangers to Earth. From wonderful spaces they came to her magical garden, shaken by thunder from paths that we cannot tread; and though not in themselves containing magic were well adapted to carry what magic her runes could give. She laid the thigh-bone of a materialist down, and turned to those stormy wanderers. She arranged them in one straight row by the side of her fire. And over them then she toppled the burning logs and the embers, prodding them down with the ebon stick that is the sceptre of witches, until she had deeply covered those seventeen cousins of Earth that had visited us from their etherial home. She stepped back then from her fire and stretched out her hands, and suddenly blasted it with a frightful rune. The flames leaped up in amazement. And what had been but a lonely fire in the night, with no more mystery than pertains to all such fires, flared suddenly into a thing that wanderers feared. As the green flames, stung by her runes, leaped up, and the heat of the fire grew intenser, she stepped backwards further and further, and merely uttered her runes a little louder the further she got from the fire. She bade Alveric pile on logs, dark logs of oak that lay there cumbering the heath; and at once, as he dropped them on, the heat licked them up; and the witch went on pronouncing her louder runes, and the flames danced wild and green; and down in the embers the seventeen, whose paths had once crossed Earth's when they wandered free, knew heat again as great as they had known, even on that desperate ride that had brought them here. And when Alveric could no longer come near the fire, and the witch was some yards from it shouting her runes, the magical flames burned all the ashes away and that portent that flared on the hill as suddenly ceased, leaving only a circle that sullenly glowed on the ground, like the evil pool that glares where thermite has burst. And flat in the glow, all liquid still, lay the sword. The witch approached it and pared its edges with a sword that she drew from her thigh. Then she sat down beside it on the earth and sang to it while it cooled. Not like the runes that enraged the flames was the song she sang to the sword: she whose curses had blasted the fire till it shrivelled big logs of oak crooned now a melody like a wind in summer blowing from wild wood gardens that no man tended, down valleys loved once by children, now lost to them but for dreams, a song of such memories as lurk and hide along the edges of oblivion, now flashing from beautiful years of glimpse of some golden moment, now passing swiftly out of remembrance again, to go back to the shades of oblivion, and leaving on the mind those faintest traces of little shining feet which when dimly perceived by us are called regrets. She sang of old Summer noons in the time of harebells: she sang on that high dark heath a song that seemed so full of mornings and evenings preserved with all their dews by her magical craft from days that had else been lost, that Alveric wondered of each small wandering wing, that her fire had lured from the dusk, if this were the ghost of some day lost to man, called up by the force of her song from times that were fairer. And all the while the unearthly metal grew harder. The white liquid stiffened and turned red. The glow of the red dwindled. And as it cooled it narrowed: little particles came together, little crevices closed: and as they closed they seized the air about them, and with the air they caught the witch's rune, and gripped it and held it forever. And so it was it became a magical sword. And little magic there is in English woods, from the time of anemones to the falling of leaves, that was not in the sword. And little magic there is in southern downs, that only sheep roam over and quiet shepherds, that the sword had not too. And there was scent of thyme in it and sight of lilac, and the chorus of birds that sings before dawn in April, and the deep proud splendour of rhododendrons, and the litheness and laughter of streams, and miles and miles of may. And by the time the sword was black it was all enchanted with magic. Nobody can tell you about that sword all that there is to be told of it; for those that know of those paths of Space on which its metals once floated, till Earth caught them one by one as she sailed past on her orbit, have little time to waste on such things as magic, and so cannot tell you how the sword was made, and those who know whence poetry is, and the need that man has for song, or know any one of the fifty branches of magic, have little time to waste on such things as science, and so cannot tell you whence its ingredients came. Enough that it was once beyond our Earth and was now here amongst our mundane stones; that it was once but as those stones, and now had something in it such as soft music has; let those that can define it. And now the witch drew the black blade forth by the hilt, which was thick and on one side rounded, for she had cut a small groove in the soil below the hilt for this purpose, and began to sharpen both sides of the sword by rubbing them with a curious greenish stone, still singing over the sword an eerie song. Alveric watched her in silence, wondering, not counting time; it may have been for moments, it may have been while the stars went far on their courses. Suddenly she was finished. She stood up with the sword lying on both her hands. She stretched it out curtly to Alveric; he took it, she turned away; and there was a look in her eyes as though she would have kept that sword, or kept Alveric. He turned to pour out his thanks, but she was gone. He rapped on the door of the dark house; he called "Witch, Witch" along the lonely heath, till children heard on far farms and were terrified. Then he turned home, and that was best for him.

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The bench

Pride and Prejudice entire, fetched and laid out here. Each row says which stages the engine ran for it, taken from the engine's own counters, so you can tell a reused stage from one that ran. The machine is named, because a timing without one tells you nothing.

Diagnostics

A declaration outside the subset is reported at the line and column it was written at, and the book lays out anyway. Take one out, or put a new one in, and watch the report change.

A stylesheet@page { size: 5.5in 8.5in; margin: 0.7in; } p { text-indent: 1.2em; color: crimson; border-radius: 3pt; } blockquote { float: left; }

Fetching the engine.

What this costs

The module weighs about 3.7 MB over the wire. It ships its own text face, its own hyphenation patterns and its own segmentation data, since the engine reads no files and asks its host for nothing. Nothing fetches it until a demo scrolls into view, and a page with no demo on it never does. If the browser reports a metered connection, you are asked first.